[#3052] Added speex nb wb bitrate in codec description

sflphone-common/src/audio/codecs/speexcodec_nb.cpp

@@ -39,7 +39,7 @@ class Speex : public AudioCodec
             _clockRate = 8000;
             _frameSize = 160; // samples, 20 ms at 8kHz
             _channel = 1;
-            _bitrate = 0;
+            _bitrate = 24;
             _bandwidth = 0;
             initSpeex();
         }

sflphone-common/src/audio/codecs/speexcodec_wb.cpp

@@ -39,7 +39,7 @@ class Speex : public AudioCodec
             _clockRate = 16000;
             _frameSize = 320; // 20 ms at 16 kHz
             _channel = 1;
-            _bitrate = 0;
+            _bitrate = 42;
             _bandwidth = 0;
             initSpeex();
         }