libavcodec/rv40.c:434: error: Uninitialized Value
  The value read from mb_strong[_] was never initialized.

libavcodec/rv40.c:434:40: 
432.         if(!row)
433.             y_h_deblock &= ~MASK_Y_TOP_ROW;
434.         if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
                                            ^
435.             y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
436.         /* Calculating chroma patterns is similar and easier since there is
