PVS-Studio warning V501 for Wine

BOOL WINAPI PlayEnhMetaFileRecord(....)
{
  ....
  if (!lpScaleWindowExtEx->xNum || !lpScaleWindowExtEx->xDenom ||
      !lpScaleWindowExtEx->xNum || !lpScaleWindowExtEx->yDenom)
    break;
  ....
}

This suspicious code was found in Wine project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions '!lpScaleWindowExtEx->xNum' to the left and to the right of the '||' operator. enhmetafile.c 1418

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/