PVS-Studio warning V547 for Firefox

NS_IMETHODIMP
nsWindowsRegKey::ReadStringValue(....)
{
  ....
  DWORD type;
  ....
  if (type != REG_SZ && type == REG_EXPAND_SZ &&
      type == REG_MULTI_SZ)
    return NS_ERROR_FAILURE;
  ....
}

This suspicious code was found in Firefox project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression is always false. Probably the '||' operator should be used here. nswindowsregkey.cpp 292

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/