From 6b15e248fae1166d7701becb015eb9c860af57d9 Mon Sep 17 00:00:00 2001
From: Alexander Larsson <alexl@redhat.com>
Date: Tue, 20 Jan 2009 22:17:06 +0100
Subject: [PATCH] move_region_on_impl - shortcut if region is empty

---
 gdk/gdkwindow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 3212d70070..f4e05b5076 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;
-- 
2.30.2