Fix for whisper-microphone example failure if audio isn't chunk aligned (#2645)

At least on my macOS Sequoia system (MBP 14" 2021, M1 Pro), when I run
the `whisper-microphone` example after it has gathered 10 seconds of
audio, it fails before the transcription:

```
Error: Insufficient buffer size 384 for input channel 0, expected 1024
```

At least for the audio device I'm using (Airpods Pro Max), there is no
guarantee that each audio buffer is a multiple of 1024 samples.  Thus at
the end of the 10 seconds, `buffered_pcm` can have some samples at the
end that do not form a complete 1024 sample chunk.

This fixes that by tracking when there is a partial chunk at the end of
the buffer, and leaving it in `buffered_pcm` to be processed on the next
loop iteration.

Note that, in the interest of keeping this PR as small as possible, I
didn't make any other changes to this example.

0 files changed, 0 insertions, 0 deletions