[gtk+] window: Avoid unnecessary attach-widget resets

[Benjamin Otte <otte src gnome org>]

commit f01cef05c89fe73958fea13b8b8a085803424412
Author: Benjamin Otte <otte redhat com>
Date:   Mon Jan 30 14:41:05 2012 +0100

    window: Avoid unnecessary attach-widget resets

 gtk/gtkwindow.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 2239203..32e736f 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -2651,6 +2651,9 @@ gtk_window_set_attached_to (GtkWindow *window,
 
   priv = window->priv;
 
+  if (priv->attach_widget == attach_widget)
+    return;
+
   remove_attach_widget (window);
 
   priv->attach_widget = attach_widget;