flacdec: Return error when blocksize code of 0 is found. It is a  reserved value per the FLAC format documentation.
flacdec: Return error when blocksize code of 0 is found. It is a 
reserved value per the FLAC format documentation.


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@17747 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg