Fixed -Wparentheses -Wchar-subscripts warnings

plugins/channelrx/chanalyzer/chanalyzersink.cpp

@@ -167,7 +167,7 @@ void ChannelAnalyzerSink::applyChannelSettings(int channelSampleRate, int sinkSa
 
         for (int i = 0; i < 7; i++) // find log2 beween 0 and 6
         {
-            if (decim & 1 == 1)
+            if ((decim & 1) == 1)
             {
                 qDebug() << "ChannelAnalyzerSink::applyChannelSettings: log2decim: " << i;
                 m_decimator.setLog2Decim(i);
@@ -308,4 +308,4 @@ void ChannelAnalyzerSink::applySampleRate()
     m_pll.setSampleRate(sampleRate);
     m_fll.setSampleRate(sampleRate);
     RRCFilter->create_rrc_filter(m_settings.m_bandwidth / (float) sampleRate, m_settings.m_rrcRolloff / 100.0);
-}
+}

plugins/channelrx/demodchirpchat/chirpchatdemoddecodertty.cpp

@@ -51,9 +51,9 @@ void ChirpChatDemodDecoderTTY::decodeSymbols(const std::vector<unsigned short>&
             char asciiChar = -1;
 
             if (ttyState == TTYLetters) {
-                asciiChar = ttyLetters[ttyChar];
+                asciiChar = ttyLetters[(int) ttyChar];
             } else if (ttyState == TTYFigures) {
-                asciiChar = ttyFigures[ttyChar];
+                asciiChar = ttyFigures[(int) ttyChar];
             }
 
             if (asciiChar >= 0) {

plugins/channelrx/filesink/filesinksink.cpp

@@ -200,7 +200,7 @@ void FileSinkSink::applyChannelSettings(
 
         for (int i = 0; i < 7; i++) // find log2 beween 0 and 6
         {
-            if (decim & 1 == 1)
+            if ((decim & 1) == 1)
             {
                 qDebug() << "FileSinkSink::applyChannelSettings: log2decim: " << i;
                 m_decimator.setLog2Decim(i);

plugins/channeltx/modchirpchat/chirpchatmodencodertty.cpp

@@ -96,8 +96,8 @@ void ChirpChatModEncoderTTY::encodeString(const QString& str, std::vector<unsign
     for (; it != asciiStr.end(); ++it)
     {
         char asciiChar = *it & 0x7F;
-        int ttyLetter = asciiToTTYLetters[asciiChar];
-        int ttyFigure = asciiToTTYFigures[asciiChar];
+        int ttyLetter = asciiToTTYLetters[(int) asciiChar];
+        int ttyFigure = asciiToTTYFigures[(int) asciiChar];
 
         if (ttyLetter < 0)
         {