Multi device support: fixed core dump (seg fault) brutally by commenting out failing instruction (AudioOutput destruction of QAudioOutput)

sdrbase/audio/audiooutput.cpp

@@ -122,7 +122,7 @@ void AudioOutput::stop()
         if (m_audioUsageCount == 0)
         {
             QIODevice::close();
-            delete m_audioOutput;
+//            delete m_audioOutput;
         }
     }
 }