Don't reference/dereference failover_listeners if it's null.

diff --git a/server/failover.c b/server/failover.c
index d931bd7717ef218af1289b523597c78e3d4e4523..feedc11835d41f693e49625132ecf6fc4e558a9d 100644 (file)
--- a/server/failover.c
+++ b/server/failover.c
@@ -43,7 +43,7 @@
 
 #ifndef lint
 static char copyright[] =
-"$Id: failover.c,v 1.38 2001/03/01 07:25:45 mellon Exp $ Copyright (c) 1999-2001 The Internet Software Consortium.  All rights reserved.\n";
+"$Id: failover.c,v 1.39 2001/03/14 17:40:59 mellon Exp $ Copyright (c) 1999-2001 The Internet Software Consortium.  All rights reserved.\n";
 #endif /* not lint */
 
 #include "dhcpd.h"
@@ -929,9 +929,11 @@ isc_result_t dhcp_failover_listen (omapi_object_t *h)
        }
 
        /* Put this listener on the list. */
-       dhcp_failover_listener_reference (&obj -> next,
-                                         failover_listeners, MDL);
-       dhcp_failover_listener_dereference (&failover_listeners, MDL);
+       if (failover_listeners) {
+               dhcp_failover_listener_reference (&obj -> next,
+                                                 failover_listeners, MDL);
+               dhcp_failover_listener_dereference (&failover_listeners, MDL);
+       }
        dhcp_failover_listener_reference (&failover_listeners, obj, MDL);
 
        return dhcp_failover_listener_dereference (&obj, MDL);