libavformat/rmdec.c:533: error: Uninitialized Value
  The value read from pos was never initialized.

libavformat/rmdec.c:533:15: 
531.     }
532.     if(type == 2)
533.         len = FFMIN(len, pos);
                   ^
534. 
535.     if(++vst->cur_slice > vst->slices)
