crc8 checking, based upon a patch by (Miroslav Lichvar <lichvarm at phoenix dot inf dot upol dot cz>)
less spam/av_log
fix synccode search
channel_order -> decorrelation_type (cosmetic i know, but the old name is too meaningless IMHO)
faster mid/side decorrelator based upon lifting transforms


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@2793 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b