net module - del popup on shutdown too to avoid leak

src/e_mod_gadcon.c

@@ -65,6 +65,8 @@ _gc_shutdown(E_Gadcon_Client *gcc)
    inst = gcc->data;
    net_cfg->instances = eina_list_remove(net_cfg->instances, inst);
    if (inst->timer) ecore_timer_del(inst->timer);
+   if (inst->popup) e_object_del(E_OBJECT(inst->popup));
+   inst->popup = NULL;
    if (inst->o_net) 
      {
 	evas_object_event_callback_del(inst->o_net, EVAS_CALLBACK_MOUSE_DOWN,