Add label to SampleSinkFifo to mention controlling component in error messages

plugins/channelrx/freqtracker/freqtracker.cpp

@@ -61,6 +61,11 @@ FreqTracker::FreqTracker(DeviceAPI *deviceAPI) :
 
     m_thread = new QThread(this);
     m_basebandSink = new FreqTrackerBaseband();
+    m_basebandSink->setFifoLabel(QString("%1 [%2:%3]")
+        .arg(m_channelId)
+        .arg(m_deviceAPI->getDeviceSetIndex())
+        .arg(getIndexInDeviceSet())
+    );
     m_basebandSink->setSpectrumSink(&m_spectrumVis);
     propagateMessageQueue(getInputMessageQueue());
     m_basebandSink->moveToThread(m_thread);