Fix to allow SDL compiled under XFree v4 to work with XFree v3 xservers.

Contributed by Jarek Sobieszek

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%4091

src/video/x11/SDL_x11gamma.c

@@ -37,7 +37,7 @@ static char rcsid =
 static int X11_SetGammaNoLock(_THIS, float red, float green, float blue)
 {
 #ifdef XFREE86_VMGAMMA
-    if (use_vidmode) {
+    if (use_vidmode >= 2) {
         XF86VidModeGamma gamma;
         Bool succeeded;
 
@@ -98,7 +98,7 @@ int X11_SetVidModeGamma(_THIS, float red, float green, float blue)
 static int X11_GetGammaNoLock(_THIS, float *red, float *green, float *blue)
 {
 #ifdef XFREE86_VMGAMMA
-    if (use_vidmode) {
+    if (use_vidmode >= 2) {
         XF86VidModeGamma gamma;
         if (XVidMode(GetGamma, (SDL_Display, SDL_Screen, &gamma))) {
             *red   = gamma.red;

src/video/x11/SDL_x11modes.c

@@ -271,7 +271,7 @@ int X11_GetVideoModes(_THIS)
         }
         XFree(modes);
 
-        use_vidmode = 1;
+        use_vidmode = vm_major;
         save_mode(this);
     }
 #endif /* XFREE86_VM */