[LibAV regression] Unable to play some added MP3s.
https://dl.dropboxusercontent.com/u/67740160/The_Ashlanders_Lament.mp3 is an MP3 that I've noticed does not play. Until the audio/video system changes it did play.
The message that appears on the command line when OpenMW attempts to play this file is Playing music/explore/the_ashlanders_lament.mp3 Music Error: FFmpeg exception: 0nsupported raw channel count:
It then tries to play another MP3 file straight afterwards.
(RM-2087 from redmine: created on 2014-11-01 by Stuart Moore, , closed on 2015-02-03 by nobody)