libavcodec/rv40.c:463: error: Uninitialized Value
  The value read from clip[_] was never initialized.

libavcodec/rv40.c:463:47: 
461.                     rv40_adaptive_loop_filter(&r->rdsp, Y+4*s->linesize,
462.                                               s->linesize, dither,
463.                                               y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0,
                                                   ^
464.                                               clip_cur, alpha, beta, betaY,
465.                                               0, 0, 0);
