add: item = glade_xml_get_widget (totem->xml, "checkbutton1");
context: totem_setup_preferences (Totem *totem){	totem->prefs = glade_xml_get_widget (totem->xml, "dialog1");	g_signal_connect (G_OBJECT (totem->prefs),			"response", G_CALLBACK (hide_prefs), (gpointer) totem);	g_signal_connect (G_OBJECT (totem->prefs), "delete-event",			G_CALLBACK (hide_prefs), (gpointer) totem);}