Fix error when using tones.beep (PR #12804)
Fixes #12620
# Summary of the issue:
Exceptions could escape nvWave when an audio device is being changed / removed.
To stress test this, call tones.beep repeatedly and connect / disconnect audio devices.
When nvWave is in error, logHandler would still try to beep. This caused additional errors in the log.
The additional errors make debugging harder.
# Description of how this pull request fixes the issue:
The exception escapes from 'sync', wrap this in a try / except
stop also ignored failures, and could call to _idleUnbuffered, which calls sync. Sync asserts that _waveout is not None.
The failures are no longer ignored.
Prevent logHandler calling beep when nvWave is in an error state.
