libavcodec/vmdav.c:489: error: Uninitialized Value
  The value read from predictor[_] was never initialized.

libavcodec/vmdav.c:489:13: 
487.         uint8_t b = *buf++;
488.         if (b & 0x80)
489.             predictor[ch] -= vmdaudio_table[b & 0x7F];
                 ^
490.         else
491.             predictor[ch] += vmdaudio_table[b];
