Open and close the file in the main thread in alffplay
Open and close the file in the main thread in alffplay

This avoid problems with the file being closed while a video refresh is still
scheduled.

irungentoo/openal-soft-tox,arkana-fts/openal-soft,arkana-fts/openal-soft,Wemersive/openal-soft,irungentoo/openal-soft-tox,aaronmjacobs/openal-soft,alexxvk/openal-soft,Wemersive/openal-soft,alexxvk/openal-soft,aaronmjacobs/openal-soft,BeamNG/openal-soft,BeamNG/openal-soft