Log Message:
-----------
Fix bug in GIN WAL redo cleanup function: don't free fake relcache entry
while it's still being used.
Backpatch to 8.4, where the fake relcache method was introduced.
Modified Files:
--------------
pgsql/src/backend/access/gin:
ginxlog.c (r1.21 -> r1.22)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/ginxlog.c?r1=1.21&r2=1.22)