[gtk+/wip/action-helper] GtkWidget: add checks to _get_action_group_by_name

[Ryan Lortie <ryanl src gnome org>]

commit e3127d8b3857bc62eeca24dee651bae8e47fa422
Author: Ryan Lortie <desrt desrt ca>
Date:   Thu Jun 21 10:26:31 2012 -0400

    GtkWidget: add checks to _get_action_group_by_name
    
    Add some appropriate g_return_val_if_fail().

 gtk/gtkwidget.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 669d2b4..71e6c63 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -14182,6 +14182,9 @@ GActionGroup *
 gtk_widget_get_action_group_by_name (GtkWidget   *widget,
                                      const gchar *name)
 {
+  g_return_if_fail (GTK_IS_WIDGET (widget), NULL);
+  g_return_val_if_fail (name != NULL, NULL);
+
   widget->priv->action_requested = TRUE;
 
   return GTK_WIDGET_GET_CLASS (widget)