libavcodec/rv40.c:522: error: Uninitialized Value
  The value read from mb_strong[_] was never initialized.

libavcodec/rv40.c:522:40: 
520.         if(!row)
521.             y_h_deblock &= ~MASK_Y_TOP_ROW;
522.         if(row == s->mb_height - 1 || (mb_strong[POS_CUR] || mb_strong[POS_BOTTOM]))
                                            ^
523.             y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
524.         /* Calculating chroma patterns is similar and easier since there is
