Log Message:
-----------
Fix thinko in multi-autovac-workers code: validity checks made by
GUC assign hooks are supposed to be made whether doit is true or not.
Modified Files:
--------------
pgsql/src/backend/utils/misc:
guc.c (r1.410 -> r1.411)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c.diff?r1=1.410&r2=1.411)