From ede9c2cf743e9532e7d39b5874ff1a5587dee6e8 Mon Sep 17 00:00:00 2001
From: Alexander Larsson <alexl@redhat.com>
Date: Sat, 6 Dec 2008 23:01:39 +0100
Subject: [PATCH] Handle gdk_window_get_impl_window on root window

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

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 5830f8ae1a..a7424e2deb 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -385,7 +385,7 @@ gdk_window_is_offscreen (GdkWindowObject *window)
 static GdkWindowObject *
 gdk_window_get_impl_window (GdkWindowObject *window)
 {
-  while (window->parent->impl == window->impl)
+  while (window->parent != NULL && window->parent->impl == window->impl)
     window = window->parent;
 
   return window;