taken from a 4.2.0-P1 -> 4.2.0-P2 diff

--- server/failover.c	2009-07-23 19:02:10.000000000 +0000
+++ server/failover.c.oden	2011-01-06 20:48:57.000000000 +0000
@@ -1101,7 +1101,8 @@ isc_result_t dhcp_failover_listener_sign
 	}		
 	if (!state) {
 		log_info ("failover: listener: no matching state");
-		return omapi_disconnect ((omapi_object_t *)c, 1);
+		omapi_disconnect ((omapi_object_t *)c, 1);
+		return(ISC_R_NOTFOUND);
 	}
 
 	obj = (dhcp_failover_link_t *)0;