silence compiler warning

diff --git a/lib/dns/rdata/generic/caa_257.c b/lib/dns/rdata/generic/caa_257.c
index 8b54ec55fd1c8eecf34bcf5cf30fc2b18783e245..e4366b24a6c226fa8d595891b9abc5fba47e01e0 100644 (file)
--- a/lib/dns/rdata/generic/caa_257.c
+++ b/lib/dns/rdata/generic/caa_257.c
@@ -58,7 +58,7 @@ fromtext_caa(ARGS_FROMTEXT) {
                                      ISC_FALSE));
        if (token.value.as_ulong > 255U)
                RETTOK(ISC_R_RANGE);
-       flags = token.value.as_ulong & 255U;
+       flags = (isc_uint8_t)(token.value.as_ulong & 255U);
        RETERR(uint8_tobuffer(flags, target));
 
        /*