libavcodec/interplayvideo.c:624: error: Uninitialized Value
  The value read from P[_] was never initialized.

libavcodec/interplayvideo.c:624:13: 
622.             B[y] = *s->stream_ptr++;
623. 
624.         if (P[4] <= P[5]) {
                 ^
625. 
626.             /* block is divided into left and right halves */
