libavcodec/vorbis_dec.c:1492: error: Uninitialized Value
  The value read from res_chan[_] was never initialized.

libavcodec/vorbis_dec.c:1492:9: 
1490.         float *mag, *ang;
1491. 
1492.         mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
              ^
1493.         ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1494.         vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
