PVS-Studio warning V576 for ReactOS

static HRESULT STDMETHODCALLTYPE
CBindStatusCallback_OnProgress(....)
{
  ...
  if (This->szMimeType[0] != _T('\0'))
    _tprintf(_T("Length: %I64u [%s]\n"),
      This->Size, This->szMimeType);
  else
    _tprintf(_T("Length: %ull\n"), This->Size);
  ...
}

%I64u should be used as well in the second case: _tprintf(_T("Length: %I64u\n"), This->Size);

This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V576 Incorrect format. Consider checking the second actual argument of the 'wprintf' function. The argument is expected to be not greater than 32-bit. dwnl dwnl.c 229

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/