libavformat/rmdec.c:506: error: Uninitialized Value
  The value read from pos was never initialized.

libavformat/rmdec.c:506:15: 
504.     }
505.     if(type == 2)
506.         len = FFMIN(len, pos);
                   ^
507. 
508.     if(++rm->cur_slice > rm->slices)
