[gtk+/client-side-windows] Handle the window being destroyed in do_synthesize_crossing_event

[Alexander Larsson <alexl src gnome org>]

commit 5dc6709ea00daabdfe4f3f89aeea958db78f1eca
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Jun 11 21:56:02 2009 +0200

    Handle the window being destroyed in do_synthesize_crossing_event
    
    This can happen since we ref the window and do the function in an idle.

 gdk/gdkwindow.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 7c50112..b843b08 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -8703,11 +8703,14 @@ do_synthesize_crossing_event (gpointer data)
   changed_toplevel = data;
   changed_toplevel_priv = (GdkWindowObject *)changed_toplevel;
 
+  changed_toplevel_priv->synthesize_crossing_event_queued = FALSE;
+
+  if (GDK_WINDOW_DESTROYED (changed_toplevel))
+    return;
+
   display = gdk_drawable_get_display (changed_toplevel);
   serial = _gdk_windowing_window_get_next_serial (display);
 
-  changed_toplevel_priv->synthesize_crossing_event_queued = FALSE;
-
   if (changed_toplevel == display->pointer_info.toplevel_under_pointer)
     {
       new_window_under_pointer =