Fix compiler warnings

plugins/channeltx/modrtty/rttymodsource.cpp

@@ -420,10 +420,9 @@ void RttyModSource::encodeText(const QString& text)
     {
         unsigned bits;
         unsigned bitCount;
-        bool error;
 
-        error = m_rttyEncoder.encode(s[i], bits, bitCount);
-        for (int j = 0; j < bitCount; j++)
+        m_rttyEncoder.encode(s[i], bits, bitCount);
+        for (unsigned int j = 0; j < bitCount; j++)
         {
             int txBit = (bits >> j) & 1;
             addBit(txBit);

sdrbase/dsp/raisedcosine.h

@@ -40,7 +40,7 @@ public:
     void create(double beta, int symbolSpan, int samplesPerSymbol, bool normaliseUpsampledAmplitude = false)
     {
         int nTaps = symbolSpan * samplesPerSymbol + 1;
-        int i, j;
+        int i;
 
         // check constraints
         if(!(nTaps & 1)) {

sdrbase/util/baudot.cpp

@@ -307,7 +307,7 @@ bool BaudotEncoder::encode(QChar c, unsigned &bits, unsigned int &bitCount)
         // Look for character in other pages
         const QString switchPage[] = { ">", "<", "\0" };
 
-        for (int page = m_page == LETTERS ? 1 : 0; page < (m_characterSet == Baudot::RUSSIAN) ? 3 : 2; page++)
+        for (int page = m_page == LETTERS ? 1 : 0; page < ((m_characterSet == Baudot::RUSSIAN) ? 3 : 2); page++)
         {
             if (m_chars[page].contains(s))
             {