Add forgotten pointer

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac408@3515 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/nsas/nameserver_address_store.cc

@@ -108,6 +108,7 @@ newZone(const std::string* zone, uint16_t class_code,
         } else {
             ns_lru->touch(ns_lookup.second);
         }
+        zone_ptr->nameserverAdd(ns_lookup.second);
     }
 
     return zone_ptr;