Log Message:
-----------
Install a more future-proof fix for the snapshot-unset bug just found.
Per suggestion from Tom Lane.
Modified Files:
--------------
pgsql/src/backend/postmaster:
autovacuum.c (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/autovacuum.c.diff?r1=1.7&r2=1.8)