[gtk+] Don't assume widgets are containers when walking the focus tree

[William Jon McCann <mccann src gnome org>]

commit f8b573766d5a9da7c0a48bcd1f1054158e67fcc0
Author: William Jon McCann <jmccann redhat com>
Date:   Fri Oct 8 19:26:01 2010 -0400

    Don't assume widgets are containers when walking the focus tree
    
    This causes problems for links in labels.

 gtk/gtkcontainer.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcontainer.c b/gtk/gtkcontainer.c
index 3f6f287..055a2ea 100644
--- a/gtk/gtkcontainer.c
+++ b/gtk/gtkcontainer.c
@@ -1867,7 +1867,7 @@ gtk_container_real_set_focus_child (GtkContainer     *container,
 	{
 
 	  focus_child = priv->focus_child;
-	  while (gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
+	  while (GTK_IS_CONTAINER (focus_child) && gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
 	    {
 	      focus_child = gtk_container_get_focus_child (GTK_CONTAINER (focus_child));
 	    }