More rigor in thread tear down

src/GAudioOutput.cc

@@ -77,10 +77,8 @@ GAudioOutput::~GAudioOutput()
     while (thread->isRunning()) {
         QGC::SLEEP::usleep(100);
     }
-    worker->deleteLater();
-    thread->deleteLater();
-    worker = NULL;
-    thread = NULL;
+    delete worker;
+    delete thread;
 }
 
 

src/audio/QGCAudioWorker.cpp

@@ -90,6 +90,7 @@ QGCAudioWorker::~QGCAudioWorker()
     pVoice = NULL;
     ::CoUninitialize();
 #endif
+    delete emergencyTimer;
 }
 
 void QGCAudioWorker::say(QString text, int severity)