silence signed/unsigned compare warning

diff --git a/lib/dns/message.c b/lib/dns/message.c
index b045697476df8a0ba63313f38f3797ac0251f810..d36edbae3b1471a3c497fdfc8bc32ddcdc4a78b0 100644 (file)
--- a/lib/dns/message.c
+++ b/lib/dns/message.c
@@ -3499,7 +3499,7 @@ 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;