PVS-Studio warning V570 for OpenCV

void CV_Resize_Test::resize_1d(....)
{
  ....
  for (int r = 0; r < cn; ++r)
  {
    xyD[r] = 0;
    for (int k = 0; k < ksize; ++k)
      xyD[r] += w[k] * xyS[k * cn + r];
    xyD[r] = xyD[r];
  }
  ....
}

This suspicious code was found in OpenCV project by PVS-Studio static code analyzer.
Warning message is:
V570 The 'xyD[r]' variable is assigned to itself. test_imgwarp_strict.cpp 560

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/