PVS-Studio warning V642 for ReactOS

HRESULT WINAPI CRecycleBin::CompareIDs(....)
{
  ....
  return MAKE_HRESULT(SEVERITY_SUCCESS, 0,
   (unsigned short)memcmp(pidl1->mkid.abID,
                          pidl2->mkid.abID,
                          pidl1->mkid.cb));
}

This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V642 Saving the 'memcmp' function result inside the 'unsigned short' type variable is inappropriate. The significant bits could be lost breaking the program's logic. recyclebin.cpp 542

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/