Initialize rrbuffer in towire_answer()

Initialize rrbuffer from *target, like the adjacent savedbuffer, to
silence a scan-build uninitialized-read false positive:

    lib/dns/rdataset.c:423:3: warning: 2nd function call argument is an uninitialized value [core.CallAndMessage]

Assisted-by: Claude:claude-opus-4-8

diff --git a/lib/dns/rdataset.c b/lib/dns/rdataset.c
index a90bb9f99e0fae3bf4e14fb9ebe9ccd49525a20c..704f214186d4a90d97bbcc7d667f1797fa92082e 100644 (file)
--- a/lib/dns/rdataset.c
+++ b/lib/dns/rdataset.c
@@ -369,7 +369,7 @@ dns_rdataset_towire(dns_rdataset_t *rdataset, const dns_name_t *owner_name,
                    bool partial, unsigned int options, unsigned int *countp) {
        isc_result_t result;
        isc_buffer_t savedbuffer = *target;
-       isc_buffer_t rrbuffer;
+       isc_buffer_t rrbuffer = *target;
        dns_fixedname_t fixed;
        dns_name_t *name = NULL;