LocalSink: safety measures to ensure processSamples does not work when thread is stopping

plugins/channelrx/localsink/localsink.cpp

@@ -111,6 +111,11 @@ void LocalSink::stop()
 {
     qDebug("LocalSink::stop");
 
+    disconnect(this,
+            SIGNAL(samplesAvailable(const quint8*, uint)),
+            m_sinkThread,
+            SLOT(processSamples(const quint8*, uint)));
+
     if (m_sinkThread != 0)
     {
         m_sinkThread->startStop(false);

plugins/channelrx/localsink/localsinkthread.cpp

@@ -74,7 +74,7 @@ void LocalSinkThread::run()
 
 void LocalSinkThread::processSamples(const quint8* data, uint count)
 {
-    if (m_sampleFifo) {
+    if (m_sampleFifo && m_running) {
         m_sampleFifo->write(data, count);
     }
 }