[gtk+] modelmenu: fix a GCC warning

[Cosimo Cecchi <cosimoc src gnome org>]

commit de3cfa6034780cc9e7a0f203dbb7e3a09413da94
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Tue Aug 21 11:15:32 2012 +0200

    modelmenu: fix a GCC warning
    
    This should not be a const string, since the caller is supposed to free
    it.

 gtk/gtkmodelmenu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkmodelmenu.c b/gtk/gtkmodelmenu.c
index dccf72a..bb6a711 100644
--- a/gtk/gtkmodelmenu.c
+++ b/gtk/gtkmodelmenu.c
@@ -84,7 +84,7 @@ gtk_model_menu_binding_append_item (GtkModelMenuBinding  *binding,
 
   if ((section = g_menu_model_get_item_link (model, item_index, "section")))
     {
-      const gchar *section_namespace = NULL;
+      gchar *section_namespace = NULL;
 
       g_menu_model_get_item_attribute (model, item_index, "label", "s", heading);
       g_menu_model_get_item_attribute (model, item_index, "action-namespace", "s", &section_namespace);