[gtk+/native-layout] Fix missing GTK_WINDOW cast in _gtk_menu_shell_update_mnemonics

[Tristan Van Berkom <tvb src gnome org>]

commit ea7bd00e925f6ef6e68189d4474011853aff9b33
Author: Christian Dywan <christian twotoasts de>
Date:   Mon Jan 4 07:29:42 2010 +0100

    Fix missing GTK_WINDOW cast in _gtk_menu_shell_update_mnemonics

 gtk/gtkmenushell.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkmenushell.c b/gtk/gtkmenushell.c
index db3a9f9..c9b8949 100644
--- a/gtk/gtkmenushell.c
+++ b/gtk/gtkmenushell.c
@@ -805,6 +805,8 @@ _gtk_menu_shell_update_mnemonics (GtkMenuShell *menu_shell)
   found = FALSE;
   while (target)
     {
+      GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (target));
+
       /* The idea with keyboard mode is that once you start using
        * the keyboard to navigate the menus, we show mnemonics
        * until the menu navigation is over. To that end, we spread
@@ -832,14 +834,12 @@ _gtk_menu_shell_update_mnemonics (GtkMenuShell *menu_shell)
        */
       if (GTK_IS_MENU_BAR (target))
         {
-          gtk_window_set_mnemonics_visible (GTK_WINDOW (gtk_widget_get_toplevel (target)),
-                                            FALSE);
+          gtk_window_set_mnemonics_visible (GTK_WINDOW (toplevel), FALSE);
           _gtk_label_mnemonics_visible_apply_recursively (GTK_WIDGET (target),
                                                           mnemonics_visible);
         }
       else
-        gtk_window_set_mnemonics_visible (GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (target))),
-                                          mnemonics_visible);
+        gtk_window_set_mnemonics_visible (GTK_WINDOW (toplevel), mnemonics_visible);
 
       if (target->active_menu_item)
         found = TRUE;