cppcheck fixes

plugins/channelrx/demodnfm/nfmdemod.cpp

@@ -501,7 +501,7 @@ int NFMDemod::webapiSettingsPutPatch(
             QString& errorMessage  __attribute__((unused)))
 {
     NFMDemodSettings settings = m_settings;
-    bool frequencyOffsetChanged;
+    bool frequencyOffsetChanged = false;
 
     if (channelSettingsKeys.contains("afBandwidth")) {
         settings.m_afBandwidth = response.getNfmDemodSettings()->getAfBandwidth();

plugins/samplesink/limesdroutput/limesdroutput.cpp

@@ -119,6 +119,7 @@ bool LimeSDROutput::openDevice()
             if (buddyShared->m_channel == requestedChannel)
             {
                 qCritical("LimeSDROutput::openDevice: cannot open busy channel %u", requestedChannel);
+                delete[] busyChannels;
                 return false;
             }
         }

plugins/samplesource/limesdrinput/limesdrinput.cpp

@@ -137,6 +137,7 @@ bool LimeSDRInput::openDevice()
             if (buddyShared->m_channel == requestedChannel)
             {
                 qCritical("LimeSDRInput::openDevice: cannot open busy channel %u", requestedChannel);
+                delete[] busyChannels;
                 return false;
             }
         }