Simplify a bit. Rather than copy all the set levels to the level cache when a level is set, just clear the cache and repopulate it when we look up a level.
Simplify a bit.
Rather than copy all the set levels to the level cache when a level is set,
just clear the cache and repopulate it when we look up a level.


git-svn-id: a1a4b28b82a3276cc491891159dd9963a0a72fae@5343 542714f4-19e9-0310-aa3c-eee0fc999fb1

threerings/narya,threerings/narya,threerings/narya,threerings/narya,threerings/narya