libavcodec/vorbisdec.c:1568: error: Uninitialized Value
  The value read from res_chan[_] was never initialized.

libavcodec/vorbisdec.c:1568:9: 
1566.         unsigned bs0 = vc->blocksize[0];
1567.         unsigned bs1 = vc->blocksize[1];
1568.         float *residue    = vc->channel_residues + res_chan[j] * blocksize / 2;
              ^
1569.         float *saved      = vc->saved + j * bs1 / 4;
1570.         float *ret        = vc->channel_floors + j * retlen;
