Add label to SampleSinkFifo to mention controlling component in error messages

plugins/samplesource/airspyhf/airspyhfinput.cpp

@@ -53,6 +53,7 @@ AirspyHFInput::AirspyHFInput(DeviceAPI *deviceAPI) :
 	m_deviceDescription("AirspyHF"),
 	m_running(false)
 {
+    m_sampleFifo.setLabel(m_deviceDescription);
     openDevice();
     m_deviceAPI->setNbSourceStreams(1);
     m_networkManager = new QNetworkAccessManager();