Fixed QZ_ToggleFullScreen() return value (thanks Max!)

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40577

src/video/quartz/SDL_QuartzVideo.m

@@ -696,7 +696,7 @@ static SDL_Surface* QZ_SetVideoMode (_THIS, SDL_Surface *current, int width,
 }
 
 static int QZ_ToggleFullScreen (_THIS, int on) {
-    return -1;
+    return 0;
 }
 
 static int QZ_SetColors (_THIS, int first_color, int num_colors,
@@ -1629,4 +1629,4 @@ static SDL_Overlay* QZ_CreateYUVOverlay (_THIS, int width, int height,
     yuv_height = overlay->h;
     
     return overlay;
-}
+}
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