QmlProfiler: Don't open 2 error boxes when failing to connect

If we've parsed an error message from the application's stderr we can
stop trying to connect.

Change-Id: I8d58e5db19de3253681c52be1637cfddfd46a519
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp

@@ -213,6 +213,7 @@ void QmlProfilerRunControl::wrongSetupMessageBox(const QString &errorMessage)
 
     // KILL
     d->m_profilerState->setCurrentState(QmlProfilerStateManager::AppDying);
+    d->m_noDebugOutputTimer.stop();
     AnalyzerManager::stopTool();
     emit finished();
 }