macosx_vout: fixed flicker when resizing the vout through AR or crop changes...

macosx_vout: fixed flicker when resizing the vout through AR or crop changes as suggested by David Fuhrmann
(cherry picked from commit 546bfa6b)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/video_output/macosx.m

@@ -334,6 +334,7 @@ static int Control (vout_display_t *vd, int query, va_list ap)
         case VOUT_DISPLAY_CHANGE_ZOOM:
         case VOUT_DISPLAY_CHANGE_SOURCE_ASPECT:
         case VOUT_DISPLAY_CHANGE_SOURCE_CROP:
+            return VLC_SUCCESS;
         case VOUT_DISPLAY_CHANGE_DISPLAY_SIZE:
         {
             if (!config_GetInt( vd, "macosx-video-autoresize" ))