Log Message:
-----------
Fix failure to check for INVALID worker entry in the new autovacuum code, which
could happen when a worker took to long to start and was thus "aborted" by the
launcher. Noticed by lionfish buildfarm member.
Modified Files:
--------------
pgsql/src/backend/postmaster:
autovacuum.c (r1.42 -> r1.43)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/autovacuum.c.diff?r1=1.42&r2=1.43)