libavcodec/vmdav.c:491: error: Uninitialized Value
  The value read from predictor[_] was never initialized.

libavcodec/vmdav.c:491:13: 
489.             predictor[ch] -= vmdaudio_table[b & 0x7F];
490.         else
491.             predictor[ch] += vmdaudio_table[b];
                 ^
492.         predictor[ch] = av_clip_int16(predictor[ch]);
493.         *out++ = predictor[ch];
