Another attempt on quitting cleanly

rktwebview.cpp

@@ -265,6 +265,7 @@ void rkt_webview_cleanup()
                 INFO0("Stopping evt_guard\n");
                 handler->guard_go_on = false;
                 handler->event_queue->enqueue(EVT_GUARD_STOP);
+                handler->event_queue->enqueue(EVT_GUARD_STOP);
                 handler->guard_thread->join();
                 delete handler->guard_thread;
                 handler->guard_thread = nullptr;