libavcodec/rv40.c:570: error: Uninitialized Value
  The value read from mb_strong[_] was never initialized.

libavcodec/rv40.c:570:82: 
568.                 }
569.                 // filter top edge of the current macroblock when filtering strength is high
570.                 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){
                                                                                      ^
571.                     rv40_h_loop_filter(Y, s->linesize, dither,
572.                                        clip_cur,
