PVS-Studio warning V501 for TortoiseGIT

class CGitStatusListCtrl :
      public CListCtrl
{
  ....
  CString m_Rev1;
  CString m_Rev2;
  ....
};

void CGitStatusListCtrl::OnContextMenuList(....)
{
  ....
  if( (!this->m_Rev1.IsEmpty()) || (!this->m_Rev1.IsEmpty()) )
  ....
}

This suspicious code was found in TortoiseGIT project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions '(!this->m_Rev1.IsEmpty())' to the left and to the right of the '||' operator. gitstatuslistctrl.cpp 1560

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/