silence signed/unsigned warning

diff --git a/lib/dns/rdata/generic/hip_55.c b/lib/dns/rdata/generic/hip_55.c
index e3f2f1ee440f2e05d4b0a017265fca3da03cc38e..a9151a21cae874b4ba51c9a40c52c09604aafcc0 100644 (file)
--- a/lib/dns/rdata/generic/hip_55.c
+++ b/lib/dns/rdata/generic/hip_55.c
@@ -211,7 +211,7 @@ fromwire_hip(ARGS_FROMWIRE) {
        if (key_len == 0)
                RETERR(DNS_R_FORMERR);
        isc_region_consume(&region, 2);
-       if (region.length < hit_len + key_len)
+       if (region.length < (unsigned)(hit_len + key_len))
                RETERR(DNS_R_FORMERR);
 
        RETERR(mem_tobuffer(target, rr.base, 4 + hit_len + key_len));