v1.6.37 - Transcoded playback no longer stops ten minutes after the transcode finishes

A file the player cannot play directly (one with embedded subtitles, for example) is transcoded
much faster than it is watched. About ten minutes after the transcode finished, its housekeeping
deleted the output while the film was still playing, and playback stopped at the next segment. A
transcode a player is still reading is now kept until it stops reading.

Upgrade: pull it.