Only modifier key state is noted when X11 window opens

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40445

src/video/x11/SDL_x11video.c

@@ -833,6 +833,30 @@ static int X11_CreateWindow(_THIS, SDL_Surface *screen,
 	/* Update the internal keyboard state */
 	X11_SetKeyboardState(SDL_Display, NULL);
 
+	/* When the window is first mapped, ignore non-modifier keys */
+	{
+		Uint8 *keys = SDL_GetKeyState(NULL);
+		for ( i = 0; i < SDLK_LAST; ++i ) {
+			switch (i) {
+			    case SDLK_NUMLOCK:
+			    case SDLK_CAPSLOCK:
+			    case SDLK_LCTRL:
+			    case SDLK_RCTRL:
+			    case SDLK_LSHIFT:
+			    case SDLK_RSHIFT:
+			    case SDLK_LALT:
+			    case SDLK_RALT:
+			    case SDLK_LMETA:
+			    case SDLK_RMETA:
+			    case SDLK_MODE:
+				break;
+			    default:
+				keys[i] = SDL_RELEASED;
+				break;
+			}
+		}
+	}
+
 	/* Map them both and go fullscreen, if requested */
 	if ( ! SDL_windowid ) {
 		XMapWindow(SDL_Display, SDL_Window);