Fix oversight in ALTER TABLE ENABLE/DISABLE RULE patch: the new enabled

field needs to be included in equalRuleLocks() comparisons, else updates
will fail to propagate into relcache entries when they have positive
reference count (ie someone is using the relcache entry).
Per report from Alex Hunsaker.

src/backend/utils/cache/relcache.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.278 2008/12/03 13:05:22 heikki Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.279 2008/12/30 03:59:19 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -777,6 +777,8 @@ equalRuleLocks(RuleLock *rlock1, RuleLock *rlock2)
 				return false;
 			if (rule1->attrno != rule2->attrno)
 				return false;
+			if (rule1->enabled != rule2->enabled)
+				return false;
 			if (rule1->isInstead != rule2->isInstead)
 				return false;
 			if (!equal(rule1->qual, rule2->qual))