Add multichannel support to EAC3 audio tracks
As requested in: http://forum.videolan.org/viewtopic.php?f=14&t=72151
VLC currently plays EAC3 audio tracks, but it downmixes them automatically to stereo (tested with VLC 1.0.5 and VLC 1.1.0-git-20100128-0002 under Win32). Request is to 5.1 and similar options when multichannel EAC3 audio track is in stream.
Sample file (1124a189.mpg) that shows the issue (one audio track is stereo, other is 5.1): http://dl.free.fr/vU2x6iJz6