Log Message:
-----------
Avoid crashing when a table is deleted while we're on the process of checking
it.
Per report from Tom Lane based on buildfarm evidence.
Modified Files:
--------------
pgsql/src/backend/postmaster:
autovacuum.c (r1.80 -> r1.81)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/autovacuum.c?r1=1.80&r2=1.81)