DemodAnalyzer: Ensure sample rate is set in worker. Fixes #2309.

plugins/feature/demodanalyzer/demodanalyzer.cpp

@@ -131,6 +131,7 @@ void DemodAnalyzer::start()
     DemodAnalyzerWorker::MsgConfigureDemodAnalyzerWorker *msg
         = DemodAnalyzerWorker::MsgConfigureDemodAnalyzerWorker::create(m_settings, QList<QString>(), true);
     m_worker->getInputMessageQueue()->push(msg);
+    m_worker->applySampleRate(m_sampleRate);
 
     if (m_dataPipe)
     {

plugins/feature/demodanalyzer/demodanalyzerworker.cpp

@@ -29,6 +29,7 @@ MESSAGE_CLASS_DEFINITION(DemodAnalyzerWorker::MsgConnectFifo, Message)
 
 DemodAnalyzerWorker::DemodAnalyzerWorker() :
     m_dataFifo(nullptr),
+    m_sinkSampleRate(0),
     m_msgQueueToFeature(nullptr),
     m_sampleBufferSize(0),
     m_wavFileRecord(nullptr),