Allow familiar idiom free_client_lease(NULL).

diff --git a/sbin/dhclient/dhclient.c b/sbin/dhclient/dhclient.c
index 1715dd3..440d87a 100644 (file)
--- a/sbin/dhclient/dhclient.c
+++ b/sbin/dhclient/dhclient.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: dhclient.c,v 1.439 2017/06/19 19:28:35 krw Exp $      */
+/*     $OpenBSD: dhclient.c,v 1.440 2017/06/21 12:37:24 krw Exp $      */
 
 /*
  * Copyright 2004 Henning Brauer <henning@openbsd.org>
@@ -1742,7 +1742,7 @@ free_client_lease(struct client_lease *lease)
        int i;
 
        /* Static leases are forever. */
-       if (lease->is_static)
+       if (lease == NULL || lease->is_static)
                return;
 
        free(lease->server_name);