libavcodec/rv40.c:491: error: Uninitialized Value
  The value read from clip[_] was never initialized.

libavcodec/rv40.c:491:33: 
489.                 // filter left block edge in edge mode (with high filtering strength)
490.                 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
491.                     clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
                                     ^
492.                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
493.                                        clip_cur,
