Fixed X11 error when running under window managers that don't support the _NET_SUPPORTING_WM_CHECK protocol.

Anytime we enter the window, we gain the mouse focus.  If we leave the window because of a normal LeaveNotify, then we lose mouse focus.

Don't set the WM_TRANSIENT_FOR property to an invalid value - delete it instead.

Get the GLX functions with glXGetProcAddress() when available.

GCC supports unnamed unions now. :)

Check to for overruns before they happen instead of afterwards.

code = 1, sym = 0xFF1B (Escape) scancode = 41 (Escape)
code = 2, sym = 0x31 (1) scancode = 30 (1)
code = 3, sym = 0x32 (2) scancode = 31 (2)
code = 4, sym = 0x33 (3) scancode = 32 (3)
code = 5, sym = 0x34 (4) scancode = 33 (4)
code = 6, sym = 0x35 (5) scancode = 34 (5)
code = 7, sym = 0x36 (6) scancode = 35 (6)
code = 8, sym = 0x37 (7) scancode = 36 (7)
code = 9, sym = 0x38 (8) scancode = 37 (8)
code = 10, sym = 0x39 (9) scancode = 38 (9)
code = 11, sym = 0x30 (0) scancode = 39 (0)
code = 12, sym = 0x2D (minus) scancode = 45 (-)
code = 13, sym = 0x3D (equal) scancode = 46 (=)
code = 14, sym = 0xFF08 (BackSpace) scancode = 42 (Backspace)
code = 15, sym = 0xFF09 (Tab) scancode = 43 (Tab)
code = 16, sym = 0x71 (q) scancode = 20 (Q)
code = 17, sym = 0x77 (w) scancode = 26 (W)
code = 18, sym = 0x65 (e) scancode = 8 (E)
code = 19, sym = 0x72 (r) scancode = 21 (R)
code = 20, sym = 0x74 (t) scancode = 23 (T)
code = 21, sym = 0x79 (y) scancode = 28 (Y)
code = 22, sym = 0x75 (u) scancode = 24 (U)
code = 23, sym = 0x69 (i) scancode = 12 (I)
code = 24, sym = 0x6F (o) scancode = 18 (O)
code = 25, sym = 0x70 (p) scancode = 19 (P)
code = 26, sym = 0x5B (bracketleft) scancode = 47 ([)
code = 27, sym = 0x5D (bracketright) scancode = 48 (])
code = 28, sym = 0xFF0D (Return) scancode = 40 (Return)
code = 29, sym = 0xFFE3 (Control_L) scancode = 224 (Left Ctrl)
code = 30, sym = 0x61 (a) scancode = 4 (A)
code = 31, sym = 0x73 (s) scancode = 22 (S)
code = 32, sym = 0x64 (d) scancode = 7 (D)
code = 33, sym = 0x66 (f) scancode = 9 (F)
code = 34, sym = 0x67 (g) scancode = 10 (G)
code = 35, sym = 0x68 (h) scancode = 11 (H)
code = 36, sym = 0x6A (j) scancode = 13 (J)
code = 37, sym = 0x6B (k) scancode = 14 (K)
code = 38, sym = 0x6C (l) scancode = 15 (L)
code = 39, sym = 0x3B (semicolon) scancode = 51 (;)
code = 40, sym = 0x27 (apostrophe) scancode = 52 (')
code = 41, sym = 0x60 (grave) scancode = 53 (`)
code = 42, sym = 0xFFE1 (Shift_L) scancode = 225 (Left Shift)
code = 43, sym = 0x5C (backslash) scancode = 49 (\)
code = 44, sym = 0x7A (z) scancode = 29 (Z)
code = 45, sym = 0x78 (x) scancode = 27 (X)
code = 46, sym = 0x63 (c) scancode = 6 (C)
code = 47, sym = 0x76 (v) scancode = 25 (V)
code = 48, sym = 0x62 (b) scancode = 5 (B)
code = 49, sym = 0x6E (n) scancode = 17 (N)
code = 50, sym = 0x6D (m) scancode = 16 (M)
code = 51, sym = 0x2C (comma) scancode = 54 (,)
code = 52, sym = 0x2E (period) scancode = 55 (.)
code = 53, sym = 0x2F (slash) scancode = 56 (/)
code = 54, sym = 0xFFE2 (Shift_R) scancode = 229 (Right Shift)
code = 55, sym = 0xFFAA (KP_Multiply) scancode = 85 (Keypad *)
code = 56, sym = 0xFFE9 (Alt_L) scancode = 226 (Left Alt)
code = 57, sym = 0x20 (space) scancode = 44 (Space)
code = 58, sym = 0xFFE5 (Caps_Lock) scancode = 57 (CapsLock)
code = 59, sym = 0xFFBE (F1) scancode = 58 (F1)
code = 60, sym = 0xFFBF (F2) scancode = 59 (F2)
code = 61, sym = 0xFFC0 (F3) scancode = 60 (F3)
code = 62, sym = 0xFFC1 (F4) scancode = 61 (F4)
code = 63, sym = 0xFFC2 (F5) scancode = 62 (F5)
code = 64, sym = 0xFFC3 (F6) scancode = 63 (F6)
code = 65, sym = 0xFFC4 (F7) scancode = 64 (F7)
code = 66, sym = 0xFFC5 (F8) scancode = 65 (F8)
code = 67, sym = 0xFFC6 (F9) scancode = 66 (F9)
code = 68, sym = 0xFFC7 (F10) scancode = 67 (F10)
code = 69, sym = 0xFF7F (Num_Lock) scancode = 83 (Numlock)
code = 70, sym = 0xFF14 (Scroll_Lock) scancode = 71 (ScrollLock)
code = 71, sym = 0xFF95 (KP_Home) scancode = 95 (Keypad 7)
code = 72, sym = 0xFF97 (KP_Up) scancode = 96 (Keypad 8)
code = 73, sym = 0xFF9A (KP_Prior) scancode = 97 (Keypad 9)
code = 74, sym = 0xFFAD (KP_Subtract) scancode = 86 (Keypad -)
code = 75, sym = 0xFF96 (KP_Left) scancode = 92 (Keypad 4)
code = 76, sym = 0xFF9D (KP_Begin) scancode = 93 (Keypad 5)
code = 77, sym = 0xFF98 (KP_Right) scancode = 94 (Keypad 6)
code = 78, sym = 0xFFAB (KP_Add) scancode = 87 (Keypad +)
code = 79, sym = 0xFF9C (KP_End) scancode = 89 (Keypad 1)
code = 80, sym = 0xFF99 (KP_Down) scancode = 90 (Keypad 2)
code = 81, sym = 0xFF9B (KP_Next) scancode = 91 (Keypad 3)
code = 82, sym = 0xFF9E (KP_Insert) scancode = 98 (Keypad 0)
code = 83, sym = 0xFF9F (KP_Delete) scancode = 99 (Keypad .)
code = 84, sym = 0xFE03 (ISO_Level3_Shift) scancode = 0 ()
code = 86, sym = 0x3C (less) scancode not found
code = 87, sym = 0xFFC8 (F11) scancode = 68 (F11)
code = 88, sym = 0xFFC9 (F12) scancode = 69 (F12)
code = 90, sym = 0xFF26 (Katakana) scancode = 0 ()
code = 91, sym = 0xFF25 (Hiragana) scancode = 0 ()
code = 92, sym = 0xFF23 (Henkan_Mode) scancode = 0 ()
code = 93, sym = 0xFF27 (Hiragana_Katakana) scancode = 0 ()
code = 94, sym = 0xFF22 (Muhenkan) scancode = 0 ()
code = 96, sym = 0xFF8D (KP_Enter) scancode = 88 (Keypad Enter)
code = 97, sym = 0xFFE4 (Control_R) scancode = 228 (Right Ctrl)
code = 98, sym = 0xFFAF (KP_Divide) scancode = 84 (Keypad /)
code = 99, sym = 0xFF61 (Print) scancode = 70 (PrintScreen)
code = 100, sym = 0xFFEA (Alt_R) scancode = 230 (Right Alt)
code = 101, sym = 0xFF0A (Linefeed) scancode = 0 ()
code = 102, sym = 0xFF50 (Home) scancode = 74 (Home)
code = 103, sym = 0xFF52 (Up) scancode = 82 (Up)
code = 104, sym = 0xFF55 (Prior) scancode = 75 (PageUp)
code = 105, sym = 0xFF51 (Left) scancode = 80 (Left)
code = 106, sym = 0xFF53 (Right) scancode = 79 (Right)
code = 107, sym = 0xFF57 (End) scancode = 77 (End)
code = 108, sym = 0xFF54 (Down) scancode = 81 (Down)
code = 109, sym = 0xFF56 (Next) scancode = 78 (PageDown)
code = 110, sym = 0xFF63 (Insert) scancode = 73 (Insert)
code = 111, sym = 0xFFFF (Delete) scancode = 76 (Delete)
code = 113, sym = 0x1008FF12 (XF86AudioMute) scancode = 0 ()
code = 114, sym = 0x1008FF11 (XF86AudioLowerVolume) scancode = 0 ()
code = 115, sym = 0x1008FF13 (XF86AudioRaiseVolume) scancode = 0 ()
code = 116, sym = 0x1008FF2A (XF86PowerOff) scancode = 0 ()
code = 117, sym = 0xFFBD (KP_Equal) scancode = 103 (Keypad =)
code = 118, sym = 0xB1 (plusminus) scancode not found
code = 119, sym = 0xFF13 (Pause) scancode = 72 (Pause)
code = 120, sym = 0x1008FF4A (XF86LaunchA) scancode = 0 ()
code = 121, sym = 0xFFAE (KP_Decimal) scancode = 99 (Keypad .)
code = 122, sym = 0xFF31 (Hangul) scancode = 0 ()
code = 123, sym = 0xFF34 (Hangul_Hanja) scancode = 0 ()
code = 125, sym = 0xFFEB (Super_L) scancode = 227 (Left GUI)
code = 126, sym = 0xFFEC (Super_R) scancode = 231 (Right GUI)
code = 127, sym = 0xFF67 (Menu) scancode = 118 (Menu)
code = 128, sym = 0xFF69 (Cancel) scancode = 120 (Stop)
code = 129, sym = 0xFF66 (Redo) scancode = 121 (Again)
code = 130, sym = 0x1005FF70 (SunProps) scancode = 0 ()
code = 131, sym = 0xFF65 (Undo) scancode = 122 (Undo)
code = 132, sym = 0x1005FF71 (SunFront) scancode = 0 ()
code = 133, sym = 0x1008FF57 (XF86Copy) scancode = 0 ()
code = 134, sym = 0x1005FF73 (SunOpen) scancode = 0 ()
code = 135, sym = 0x1008FF6D (XF86Paste) scancode = 0 ()
code = 136, sym = 0xFF68 (Find) scancode = 126 (Find)
code = 137, sym = 0x1008FF58 (XF86Cut) scancode = 0 ()
code = 138, sym = 0xFF6A (Help) scancode = 117 (Help)
code = 139, sym = 0x1008FF65 (XF86MenuKB) scancode = 0 ()
code = 140, sym = 0x1008FF1D (XF86Calculator) scancode = 0 ()
code = 142, sym = 0x1008FF2F (XF86Sleep) scancode = 0 ()
code = 143, sym = 0x1008FF2B (XF86WakeUp) scancode = 0 ()
code = 144, sym = 0x1008FF5D (XF86Explorer) scancode = 0 ()
code = 145, sym = 0x1008FF7B (XF86Send) scancode = 0 ()
code = 147, sym = 0x1008FF8A (XF86Xfer) scancode = 0 ()
code = 148, sym = 0x1008FF41 (XF86Launch1) scancode = 0 ()
code = 149, sym = 0x1008FF42 (XF86Launch2) scancode = 0 ()
code = 150, sym = 0x1008FF2E (XF86WWW) scancode = 0 ()
code = 151, sym = 0x1008FF5A (XF86DOS) scancode = 0 ()
code = 152, sym = 0x1008FF2D (XF86ScreenSaver) scancode = 0 ()
code = 154, sym = 0x1008FF74 (XF86RotateWindows) scancode = 0 ()
code = 155, sym = 0x1008FF19 (XF86Mail) scancode = 0 ()
code = 156, sym = 0x1008FF30 (XF86Favorites) scancode = 0 ()
code = 157, sym = 0x1008FF33 (XF86MyComputer) scancode = 0 ()
code = 158, sym = 0x1008FF26 (XF86Back) scancode = 0 ()
code = 159, sym = 0x1008FF27 (XF86Forward) scancode = 0 ()
code = 161, sym = 0x1008FF2C (XF86Eject) scancode = 0 ()
code = 162, sym = 0x1008FF2C (XF86Eject) scancode = 0 ()
code = 163, sym = 0x1008FF17 (XF86AudioNext) scancode = 0 ()
code = 164, sym = 0x1008FF14 (XF86AudioPlay) scancode = 0 ()
code = 165, sym = 0x1008FF16 (XF86AudioPrev) scancode = 0 ()
code = 166, sym = 0x1008FF15 (XF86AudioStop) scancode = 0 ()
code = 167, sym = 0x1008FF1C (XF86AudioRecord) scancode = 0 ()
code = 168, sym = 0x1008FF3E (XF86AudioRewind) scancode = 0 ()
code = 169, sym = 0x1008FF6E (XF86Phone) scancode = 0 ()
code = 171, sym = 0x1008FF81 (XF86Tools) scancode = 0 ()
code = 172, sym = 0x1008FF18 (XF86HomePage) scancode = 0 ()
code = 173, sym = 0x1008FF73 (XF86Reload) scancode = 0 ()
code = 174, sym = 0x1008FF56 (XF86Close) scancode = 0 ()
code = 177, sym = 0x1008FF78 (XF86ScrollUp) scancode = 0 ()
code = 178, sym = 0x1008FF79 (XF86ScrollDown) scancode = 0 ()
code = 179, sym = 0x28 (parenleft) scancode not found
code = 180, sym = 0x29 (parenright) scancode not found
code = 181, sym = 0x1008FF68 (XF86New) scancode = 0 ()
code = 182, sym = 0xFF66 (Redo) scancode = 121 (Again)
code = 183, sym = 0x1008FF81 (XF86Tools) scancode = 0 ()
code = 184, sym = 0x1008FF45 (XF86Launch5) scancode = 0 ()
code = 185, sym = 0x1008FF65 (XF86MenuKB) scancode = 0 ()
code = 192, sym = 0x1008FFA9 (XF86TouchpadToggle) scancode = 0 ()
code = 195, sym = 0xFF7E (Mode_switch) scancode = 257 (ModeSwitch)
code = 200, sym = 0x1008FF14 (XF86AudioPlay) scancode = 0 ()
code = 201, sym = 0x1008FF31 (XF86AudioPause) scancode = 0 ()
code = 202, sym = 0x1008FF43 (XF86Launch3) scancode = 0 ()
code = 203, sym = 0x1008FF44 (XF86Launch4) scancode = 0 ()
code = 204, sym = 0x1008FF4B (XF86LaunchB) scancode = 0 ()
code = 205, sym = 0x1008FFA7 (XF86Suspend) scancode = 0 ()
code = 206, sym = 0x1008FF56 (XF86Close) scancode = 0 ()
code = 207, sym = 0x1008FF14 (XF86AudioPlay) scancode = 0 ()
code = 208, sym = 0x1008FF97 (XF86AudioForward) scancode = 0 ()
code = 210, sym = 0xFF61 (Print) scancode = 70 (PrintScreen)
code = 212, sym = 0x1008FF8F (XF86WebCam) scancode = 0 ()
code = 215, sym = 0x1008FF19 (XF86Mail) scancode = 0 ()
code = 217, sym = 0x1008FF1B (XF86Search) scancode = 0 ()
code = 219, sym = 0x1008FF3C (XF86Finance) scancode = 0 ()
code = 221, sym = 0x1008FF36 (XF86Shop) scancode = 0 ()
code = 223, sym = 0xFF69 (Cancel) scancode = 120 (Stop)
code = 224, sym = 0x1008FF03 (XF86MonBrightnessDown) scancode = 0 ()
code = 225, sym = 0x1008FF02 (XF86MonBrightnessUp) scancode = 0 ()
code = 226, sym = 0x1008FF32 (XF86AudioMedia) scancode = 0 ()
code = 227, sym = 0x1008FF59 (XF86Display) scancode = 0 ()
code = 228, sym = 0x1008FF04 (XF86KbdLightOnOff) scancode = 0 ()
code = 229, sym = 0x1008FF06 (XF86KbdBrightnessDown) scancode = 0 ()
code = 230, sym = 0x1008FF05 (XF86KbdBrightnessUp) scancode = 0 ()
code = 231, sym = 0x1008FF7B (XF86Send) scancode = 0 ()
code = 232, sym = 0x1008FF72 (XF86Reply) scancode = 0 ()
code = 233, sym = 0x1008FF90 (XF86MailForward) scancode = 0 ()
code = 234, sym = 0x1008FF77 (XF86Save) scancode = 0 ()
code = 235, sym = 0x1008FF5B (XF86Documents) scancode = 0 ()
code = 236, sym = 0x1008FF93 (XF86Battery) scancode = 0 ()
code = 237, sym = 0x1008FF94 (XF86Bluetooth) scancode = 0 ()
code = 238, sym = 0x1008FF95 (XF86WLAN) scancode = 0 ()

Don't send events for unprintable characters

Fixed the X11 icon on 64-bit systems

Don't crash if someone tries to delete a context after we've unloaded the library.  In this case it's SDL_compat that doesn't know SDL_VideoQuit() has been called.  Hmm...

In function GLES_RenderCopy() in SDL_renderer_gles.c:819 there is one memcpy()
that can be avoided if we're updating whole texture.
Because of that the SDL 1.3 in compatibility mode is working even slower than
software rendering in SDL 1.2.

Unfortunately, this doesn't work.  I also noticed that maximizing doesn't work as well.  Also xprop hangs when trying to list properties of SDL windows.... ???