MenuShell: Typecheck the instance @ select_first()

since this is public API and therefore might get junk passed to it.

diff --git a/gtk/gtkmenushell.c b/gtk/gtkmenushell.c
index 1126d94620519a031a6ded8ec4b584bf2631a9e8..a69bc0ada8d868f79641795c98c5bddbb3426590 100644 (file)
--- a/gtk/gtkmenushell.c
+++ b/gtk/gtkmenushell.c
@@ -1231,9 +1231,13 @@ void
 gtk_menu_shell_select_first (GtkMenuShell *menu_shell,
                              gboolean      search_sensitive)
 {
-  GtkMenuShellPrivate *priv = menu_shell->priv;
+  GtkMenuShellPrivate *priv;
   GList *tmp_list;
 
+  g_return_if_fail (GTK_IS_MENU_SHELL (menu_shell));
+
+  priv = menu_shell->priv;
+
   tmp_list = priv->children;
   while (tmp_list)
     {