[gtk+/client-side-windows: 97/284] move_region_on_impl - shortcut if region is empty

[Alexander Larsson <alexl src gnome org>]

commit 6b15e248fae1166d7701becb015eb9c860af57d9
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Jan 20 22:17:06 2009 +0100

    move_region_on_impl - shortcut if region is empty
---
 gdk/gdkwindow.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 3212d70..f4e05b5 100644
--- 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;