Fix minor memory leak introduced in recent SQL-functions hacking: the

DestReceiver created during postquel_start needs to be destroyed during
postquel_end.  In a moment of brain fade I had assumed this would be taken
care of by FreeQueryDesc, but it's not (and shouldn't be).

src/backend/executor/functions.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/executor/functions.c,v 1.128 2008/10/31 21:07:55 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/executor/functions.c,v 1.129 2008/11/27 00:10:04 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -501,6 +501,8 @@ postquel_end(execution_state *es)
 		PopActiveSnapshot();
 	}
 
+	(*es->qd->dest->rDestroy) (es->qd->dest);
+
 	FreeQueryDesc(es->qd);
 	es->qd = NULL;
 }