libavcodec/interplayvideo.c:503: error: Uninitialized Value
  The value read from P[_] was never initialized.

libavcodec/interplayvideo.c:503:35: 
501.         }
502. 
503.     } else if ((P[0] <= P[1]) && (P[2] > P[3])) {
                                       ^
504. 
505.         /* 1 of 4 colors for each 2x2 block, need 4 more bytes */
