PVS-Studio warning V501 for Ultimate ToolBox

void COX3DTabViewContainer::OnNcPaint()
{
  ...
  if(rectClient.top<rectClient.bottom &&
     rectClient.top<rectClient.bottom)
  {
    dc.ExcludeClipRect(rectClient);
  }
  ...
}

This suspicious code was found in Ultimate ToolBox 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. UT ox3dtabview.cpp 230

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/