libavcodec/rv40.c:482: error: Uninitialized Value
  The value read from mvmasks[_] was never initialized.

libavcodec/rv40.c:482:40: 
480.                     rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
481.                                        clip_cur,
482.                                        mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0,
                                            ^
483.                                        alpha, beta, betaY, 0, 1, 0);
484.                 }
