libavcodec/rv40.c:515: error: Uninitialized Value
  The value read from cbp[_] was never initialized.

libavcodec/rv40.c:515:9: 
513.          * 3/4 pel in any component (any edge orientation for some reason).
514.          */
515.         y_v_deblock =   y_to_deblock
             ^
516.                     | ((cbp[POS_CUR]                      << 1) & ~MASK_Y_LEFT_COL)
517.                     | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3);
