Fix flaky cross-platform variadic connect

src/ui/MainWindow.cc

@@ -136,7 +136,7 @@ MainWindow::MainWindow(QSplashScreen* splashScreen, enum MainWindow::CUSTOM_MODE
     this->setAttribute(Qt::WA_DeleteOnClose);
     connect(menuActionHelper, SIGNAL(needToShowDockWidget(QString,bool)),SLOT(showDockWidget(QString,bool)));
     
-    connect(mavlink, &MAVLinkProtocol::protocolStatusMessage, this, &MainWindow::showCriticalMessage);
+    connect(mavlink, SIGNAL(protocolStatusMessage(const QString&, const QString&)), this, SIGNAL(showCriticalMessage(const QString&, const QString&)));
     connect(mavlink, &MAVLinkProtocol::saveTempFlightDataLog, this, &MainWindow::_saveTempFlightDataLog);
     
     loadSettings();