libavcodec/rv40.c:578: error: Uninitialized Value
  The value read from clip[_] was never initialized.

libavcodec/rv40.c:578:33: 
576.                 // filter left block edge in edge mode (with high filtering strength)
577.                 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){
578.                     clip_left = (cbp[POS_LEFT] | mvmasks[POS_LEFT]) & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
                                     ^
579.                     rv40_v_loop_filter(Y, s->linesize, dither,
580.                                        clip_cur,
