libavcodec/rv40.c:573: error: Uninitialized Value
  The value read from cbp[_] was never initialized.

libavcodec/rv40.c:573:40: 
571.                     rv40_h_loop_filter(Y, s->linesize, dither,
572.                                        clip_cur,
573.                                        (cbp[POS_TOP] | mvmasks[POS_TOP]) & (MASK_TOP << i) ? clip[POS_TOP] : 0,
                                            ^
574.                                        alpha, beta, betaY, 0, 1);
575.                 }
