PVS-Studio warning V501 for QT

QWindowsNativeImage *QWindowsFontEngine::drawGDIGlyph(....)
{
  ....
  int gx = gm.x.toInt();
  int gy = gm.y.toInt();
  int iw = gm.width.toInt();
  int ih = gm.height.toInt();
  if (iw <= 0 || iw <= 0)
    return 0;
  ....
}

This suspicious code was found in QT project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions to the left and to the right of the '||' operator: iw <= 0 || iw <= 0 qwindowsfontengine.cpp 1095

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/