Is that 'private' you see there? Omigod. It is.
Normally we eschew private because we feel like people should be
able to use our classes how they see fit.
However, you *really* shouldn't be futzing with these fields,
and them being protected would allow someone to write an Enum subclass
and fuck-up other unrelated Enum subclasses, so I'm making an exception here.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5365 542714f4-19e9-0310-aa3c-eee0fc999fb1