Undo diasming VM check warning in vacuumlazy.c (#213)

Author: knizhnik

src/backend/access/heap/vacuumlazy.c

@@ -1496,10 +1496,7 @@ lazy_scan_heap(LVRelState *vacrel, VacuumParams *params, bool aggressive)
 		else if (all_visible_according_to_vm && !PageIsAllVisible(page)
 				 && VM_ALL_VISIBLE(vacrel->rel, blkno, &vmbuffer))
 		{
-			/* ZENITH-XXX: all visible hint is not wal-logged
-			 * FIXME: Replay visibilitymap changes in pageserver
-			 */
-			elog(DEBUG1, "page is not marked all-visible but visibility map bit is set in relation \"%s\" page %u",
+			elog(WARNING, "page is not marked all-visible but visibility map bit is set in relation \"%s\" page %u",
 				 vacrel->relname, blkno);
 			visibilitymap_clear(vacrel->rel, blkno, vmbuffer,
 								VISIBILITYMAP_VALID_BITS);