Fix a crash when emitting dbeug info for forward-declared scoped enums.
It is possible for enums to be created as part of their own
declcontext. We need to cache a placeholder to avoid the type being
created twice before hitting the cache.


git-svn-id: 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 6fbed68720badec2bcafeb98ecb554c681ae75ad)
2 files changed