silence signed/unsigned warning

diff --git a/bin/named/client.c b/bin/named/client.c
index bd48f0ab0e5f6181380ec35ac0d5021321f236d2..947d90b309d54930cc22534711dd1cc738beb514 100644 (file)
--- a/bin/named/client.c
+++ b/bin/named/client.c
@@ -1787,7 +1787,7 @@ process_ecs(ns_client_t *client, isc_buffer_t *buf, size_t optlen) {
        isc_netaddr_t caddr;
        int i;
 
-       if (optlen < 4) {
+       if (optlen < 4U) {
                ns_client_log(client, NS_LOGCATEGORY_CLIENT,
                              NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(2),
                              "EDNS client subnet option too short");