silence signed/unsigned compare warning

diff --git a/lib/dns/message.c b/lib/dns/message.c
index a492a6a9c9f8f204fec4d2a4c6a4a4c5c1024997..aa8d9014452177f484e8878b7190dd40a2c97622 100644 (file)
--- a/lib/dns/message.c
+++ b/lib/dns/message.c
@@ -3540,7 +3540,7 @@ dns_message_buildopt(dns_message_t *message, dns_rdataset_t **rdatasetp,
        /*
         * Set EDNS options if applicable
         */
-       if (count != 0) {
+       if (count != 0U) {
                isc_buffer_t *buf = NULL;
                for (i = 0; i < count; i++)
                        len += ednsopts[i].length + 4;