[gtk+] a11y: Only care about GtkOrientable::orientation

[Benjamin Otte <otte src gnome org>]

commit 50e3f532b93f7d7eb755804a80c69eac79ca078e
Author: Benjamin Otte <otte redhat com>
Date:   Fri Mar 9 13:18:52 2012 +0100

    a11y: Only care about GtkOrientable::orientation
    
    There are other widgets (like PanelToplevel) that aren't a GtkOrientable
    but still have that property.

 gtk/a11y/gtkwidgetaccessible.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtk/a11y/gtkwidgetaccessible.c b/gtk/a11y/gtkwidgetaccessible.c
index ff31743..c386eb3 100644
--- a/gtk/a11y/gtkwidgetaccessible.c
+++ b/gtk/a11y/gtkwidgetaccessible.c
@@ -465,7 +465,8 @@ gtk_widget_accessible_notify_gtk (GObject    *obj,
       state = ATK_STATE_SENSITIVE;
       value = gtk_widget_get_sensitive (widget);
     }
-  else if (g_strcmp0 (pspec->name, "orientation") == 0)
+  else if (g_strcmp0 (pspec->name, "orientation") == 0 &&
+           GTK_IS_ORIENTABLE (widget))
     {
       GtkOrientable *orientable;