Initialize m_audioSampleRate in constructors where missing. Fixes #554

plugins/channelrx/demodam/amdemodsink.cpp

@@ -28,6 +28,7 @@
 
 AMDemodSink::AMDemodSink() :
         m_channelSampleRate(48000),
+        m_audioSampleRate(48000),
         m_channelFrequencyOffset(0),
         m_squelchCount(0),
         m_squelchOpen(false),

plugins/channelrx/demoddsd/dsddemodsink.cpp

@@ -40,6 +40,7 @@
 
 DSDDemodSink::DSDDemodSink() :
     m_channelSampleRate(48000),
+    m_audioSampleRate(48000),
     m_channelFrequencyOffset(0),
     m_interpolatorDistance(0.0f),
     m_interpolatorDistanceRemain(0.0f),

plugins/channelrx/demodfreedv/freedvdemodsink.cpp

@@ -134,6 +134,7 @@ FreeDVDemodSink::FreeDVDemodSink() :
         m_channelSampleRate(48000),
         m_modemSampleRate(48000),
         m_speechSampleRate(8000), // fixed 8 kS/s
+        m_audioSampleRate(48000),
         m_channelFrequencyOffset(0),
         m_audioMute(false),
         m_simpleAGC(0.003f, 0.0f, 1e-6f),

plugins/channelrx/demodssb/ssbdemodsink.cpp

@@ -47,7 +47,8 @@ SSBDemodSink::SSBDemodSink() :
         m_squelchDelayLine(2*48000),
         m_audioActive(false),
         m_spectrumSink(nullptr),
-        m_audioFifo(24000)
+        m_audioFifo(24000),
+        m_audioSampleRate(48000)
 {
 	m_Bandwidth = 5000;
 	m_LowCutoff = 300;

plugins/channelrx/demodwfm/wfmdemodsink.cpp

@@ -33,6 +33,7 @@ const unsigned int WFMDemodSink::m_rfFilterFftLength = 1024;
 
 WFMDemodSink::WFMDemodSink() :
     m_channelSampleRate(384000),
+    m_audioSampleRate(48000),
     m_channelFrequencyOffset(0),
     m_squelchOpen(false),
     m_magsq(0.0f),

plugins/channeltx/modfreedv/freedvmodsource.cpp

@@ -29,6 +29,7 @@ FreeDVModSource::FreeDVModSource() :
     m_channelSampleRate(48000),
     m_channelFrequencyOffset(0),
     m_modemSampleRate(48000), // // default 2400A mode
+    m_audioSampleRate(48000),
     m_lowCutoff(0.0),
     m_hiCutoff(6000.0),
     m_SSBFilter(nullptr),