PVS-Studio warning V560 for Pcsx2

LRESULT CALLBACK IOP_DISASM(HWND hDlg, UINT message,
                        WPARAM wParam, LPARAM lParam)
{
  ...
  switch(LOWORD(wParam))
  {
    case (IDOK || IDCANCEL):
      EndDialog(hDlg,TRUE);
      return(TRUE);
      break;
  }
  ...
}

Most likely this is what should be written here:  case IDOK: case IDCANCEL:

This suspicious code was found in Pcsx2 project by PVS-Studio static code analyzer.
Warning message is:
V560 A part of conditional expression is always true: 2. pcsx2 debugger.cpp 321

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/