Add av_uninit to vbA[1-8], vbB[1-8] variables to work around some 'may be used uninitialized' warnings.
Add av_uninit to vbA[1-8], vbB[1-8] variables to work around
some 'may be used uninitialized' warnings.


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@17963 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

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