If resamples crashes, OpenUtau stucks on "isPlaying" and won't render anything untill reopen the program

[HeidenBZR]

If resampler crashes (easy way to break it is to make oto with no white space), then resampler gives no result

here Data is not null, but empty: The render stucks, and pressing Play again won't do a thing, because PlaybackManager.renderTask still exists and does nothing.

[stakira]

Now playback shows exception to user.