[gtk+/client-side-windows: 75/284] Correct type checks on gdk_window_set_group entry.

[Alexander Larsson <alexl src gnome org>]

commit e63de13f4089908a9c2ddcbf996167d871566b46
Author: Alexander Larsson <alexl redhat com>
Date:   Fri Dec 19 11:07:09 2008 +0100

    Correct type checks on gdk_window_set_group entry.
---
 gdk/x11/gdkwindow-x11.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/gdk/x11/gdkwindow-x11.c b/gdk/x11/gdkwindow-x11.c
index 272b447..0500f07 100644
--- a/gdk/x11/gdkwindow-x11.c
+++ b/gdk/x11/gdkwindow-x11.c
@@ -4243,8 +4243,9 @@ gdk_window_set_group (GdkWindow *window,
 {
   GdkToplevelX11 *toplevel;
   
+  g_return_if_fail (GDK_IS_WINDOW (window));
   g_return_if_fail (GDK_WINDOW_TYPE (window) != GDK_WINDOW_CHILD);
-  g_return_if_fail (leader == NULL);
+  g_return_if_fail (leader == NULL || GDK_IS_WINDOW (leader));
 
   if (GDK_WINDOW_DESTROYED (window) ||
       (leader != NULL && GDK_WINDOW_DESTROYED (leader)) ||