udhcp: cleanup of static lease handling

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c
index 403a8bc..c318856 100644
--- a/networking/udhcp/leases.c
+++ b/networking/udhcp/leases.c
@@ -159,8 +159,8 @@
 		if ((addr & 0xff) == 0xff)
 			continue;
 		net_addr = htonl(addr);
-		/* addr has a static lease? */
-		if (reservedIp(server_config.static_leases, net_addr))
+		/* is this a static lease addr? */
+		if (is_nip_reserved(server_config.static_leases, net_addr))
 			continue;
 
 		lease = find_lease_by_yiaddr(net_addr);