Some small fixes suggested by Coverity Scan

src/StretchCalculator.cpp

@@ -45,6 +45,7 @@ StretchCalculator::StretchCalculator(size_t sampleRate,
     m_recovery(0),
     m_prevRatio(1.0),
     m_transientAmnesty(0),
+    m_debugLevel(0),
     m_useHardPeaks(useHardPeaks)
 {
 //    std::cerr << "StretchCalculator::StretchCalculator: useHardPeaks = " << useHardPeaks << std::endl;

src/StretchCalculator.h

@@ -102,7 +102,6 @@ protected:
                                 float adj) const;
 
     size_t m_sampleRate;
-    size_t m_blockSize;
     size_t m_increment;
     float m_prevDf;
     double m_divergence;

src/StretcherChannelData.cpp

@@ -249,6 +249,7 @@ RubberBandStretcher::Impl::ChannelData::~ChannelData()
     deallocate(accumulator);
     deallocate(windowAccumulator);
     deallocate(fltbuf);
+    deallocate(dblbuf);
 
     for (std::map<size_t, FFT *>::iterator i = ffts.begin();
          i != ffts.end(); ++i) {

src/StretcherImpl.cpp

@@ -1118,11 +1118,15 @@ RubberBandStretcher::Impl::calculateStretch()
 
     double prdm = 0, sdm = 0;
     if (!m_phaseResetDf.empty()) {
-        for (int i = 0; i < m_phaseResetDf.size(); ++i) prdm += m_phaseResetDf[i];
+        for (int i = 0; i < (int)m_phaseResetDf.size(); ++i) {
+            prdm += m_phaseResetDf[i];
+        }
         prdm /= m_phaseResetDf.size();
     }
     if (!m_stretchDf.empty()) {
-        for (int i = 0; i < m_stretchDf.size(); ++i) sdm += m_stretchDf[i];
+        for (int i = 0; i < (int)m_stretchDf.size(); ++i) {
+            sdm += m_stretchDf[i];
+        }
         sdm /= m_stretchDf.size();
     }
 //    std::cerr << "phase reset df mean = " << prdm << ", stretch df mean = " << sdm << std::endl;

src/base/Scavenger.h

@@ -130,6 +130,7 @@ template <typename T>
 Scavenger<T>::Scavenger(int sec, int defaultObjectListSize) :
     m_objects(ObjectTimeList(defaultObjectListSize)),
     m_sec(sec),
+    m_lastExcess(0),
     m_claimed(0),
     m_scavenged(0),
     m_asExcess(0)