message: Fix UB in CopyMakeConstBoder_8u
  Caused by overflow of arithmetic operators conversion rank
diff: @@ -1325,13 +1325,12 @@ void copyMakeConstBorder_8u( const uchar* src, size_t srcstep, cv::Size srcroi,
  memcpy( dstInner + srcroi.width, constBuf, right );
  }
  - dst += dststep*top;
  -
  for( i = 0; i < top; i++ )
  - memcpy(dst + (i - top)*dststep, constBuf, dstroi.width);
  + memcpy(dst + i * dststep, constBuf, dstroi.width);
  + dst += (top + srcroi.height) * dststep;
  for( i = 0; i < bottom; i++ )
  - memcpy(dst + (i + srcroi.height)*dststep, constBuf, dstroi.width);
  + memcpy(dst + i * dststep, constBuf, dstroi.width);
  }
  }
  