whisper : remove speed_up and phase_vocoder* functions (whisper/2…

…198)

* whisper : fix cast warning

* whisper : remove phase_vocoder functions, ref #2195

* whisper : remove speed_up from whisper_full_params, closes #2195

examples/common.h

@@ -185,7 +185,7 @@ class wav_writer {
  // It is assumed that PCM data is normalized to a range from -1 to 1
  bool write_audio(const float * data, size_t length) {
  for (size_t i = 0; i < length; ++i) {
- const int16_t intSample = data[i] * 32767;
+ const int16_t intSample = int16_t(data[i] * 32767);
  file.write(reinterpret_cast<const char *>(&intSample), sizeof(int16_t));
  dataSize += sizeof(int16_t);
  }