move_region_on_impl - shortcut if region is empty

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 3212d700702bd80e58337a839349f8c651bed7eb..f4e05b50766671442e71091a59174f51f270f0e9 100644 (file)
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -2523,7 +2523,8 @@ move_region_on_impl (GdkWindowObject *private,
   GdkWindowObject *impl_window;
   gboolean free_region;
 
-  if (dx == 0 && dy == 0)
+  if ((dx == 0 && dy == 0) ||
+      gdk_region_empty (region))
     {
       gdk_region_destroy (region);
       return;