libavcodec/interplayvideo.c:506: error: Uninitialized Value
  The value read from P[_] was never initialized.

libavcodec/interplayvideo.c:506:9: 
504.             P[1] = *s->stream_ptr++;
505.         }
506.         memset(s->pixel_ptr,     P[0], 4);
             ^
507.         memset(s->pixel_ptr + 4, P[1], 4);
508.         s->pixel_ptr += s->stride;
