Add label to SampleSinkFifo to mention controlling component in error messages

plugins/channelrx/udpsink/udpsink.cpp

@@ -54,6 +54,11 @@ UDPSink::UDPSink(DeviceAPI *deviceAPI) :
 
     m_thread = new QThread(this);
     m_basebandSink = new UDPSinkBaseband();
+    m_basebandSink->setFifoLabel(QString("%1 [%2:%3]")
+        .arg(m_channelId)
+        .arg(m_deviceAPI->getDeviceSetIndex())
+        .arg(getIndexInDeviceSet())
+    );
     m_basebandSink->setSpectrum(&m_spectrumVis);
     m_basebandSink->moveToThread(m_thread);