Log Message:
-----------
Fix another case in which autovacuum would fail while analyzing
expressional indexes. Per report from Brian Hirt.
Modified Files:
--------------
pgsql/src/backend/commands:
vacuum.c (r1.319 -> r1.320)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/vacuum.c.diff?r1=1.319&r2=1.320)