Log Message:
-----------
Avoid integer overflow issues in autovacuum.
Modified Files:
--------------
pgsql/src/backend/postmaster:
autovacuum.c (r1.49 -> r1.50)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/autovacuum.c.diff?r1=1.49&r2=1.50)
pgsql/src/backend/utils/misc:
guc.c (r1.396 -> r1.397)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c.diff?r1=1.396&r2=1.397)