remove some compile warnings

Author: pschatzmann

src/AudioA2DP.h

@@ -50,7 +50,9 @@ class ChannelConverter {
 NBuffer<uint8_t> a2dp_buffer(A2DP_BUFFER_SIZE, A2DP_BUFFER_COUNT);
 // flag to indicated that we are ready to process data
 volatile bool is_a2dp_active = false;
+// Volume control
 SimulatedAudioPot a2dp_volume_control;
+// actul volume factor
 float a2dp_volume=1.0;
 
 // callback used by A2DP to provide the a2dp_source sound data

src/AudioTools/AudioOutput.h

@@ -614,7 +614,7 @@ class FormatConverterStream : public AudioPrint {
             if (no_conversion){
                 result = p_out->write(data, len);
             } else if (convert.multiply>0){
-                int size = len / p_info_in->bits_per_sample / 8;
+                //int size = len / p_info_in->bits_per_sample / 8;
                 convert.target_bits_per_sample = p_info_out->bits_per_sample;
                 switch(p_info_in->bits_per_sample) {
                     case 8:

src/AudioTools/Vector.h

@@ -260,9 +260,9 @@ class Vector {
     T *data = nullptr;
 
     inline void resize_internal(int newSize, bool copy, bool shrink=false)  {
-      bool withNewSize = false;
+      //bool withNewSize = false;
       if (newSize>bufferLen || this->data==nullptr ||shrink){
-        withNewSize = true;            
+        //withNewSize = true;            
         T* oldData = data;
         int oldBufferLen = this->bufferLen;
         this->data = new T[newSize+1];