SDL_SetWindowGammaRamp check

code/sdl/sdl_gamma.c

@@ -88,6 +88,9 @@ void GLimp_SetGamma( unsigned char red[256], unsigned char green[256], unsigned
 		}
 	}
 
-	SDL_SetWindowGammaRamp(SDL_window, table[0], table[1], table[2]);
+	if (SDL_SetWindowGammaRamp(SDL_window, table[0], table[1], table[2]) < 0)
+	{
+		ri.Printf( PRINT_DEVELOPER, "SDL_SetWindowGammaRamp() failed.\n" );
+	}
 }