s4:kdc:sdb_to_hdb: Fix CID 1665466

s4:kdc:sdb_to_hdb: Fix CID 1665466

Fix:
*** CID 1665466:         Resource leaks  (RESOURCE_LEAK)
/source4/kdc/sdb_to_hdb.c: 482             in sdb_entry_to_hdb_entry()
476     	}
477
478     	h->context = ske;
479     	if (ske != NULL) {
480     		ske->kdc_entry = h;
481     	}
>>>     CID 1665466:         Resource leaks  (RESOURCE_LEAK)
>>>     Variable "kt" going out of scope leaks the storage "kt.val" points to.
482     	return 0;
483     error:
484     	free_hdb_entry(h);
485     	return rc;

This is almost certainly a false positive as when kt.len == 0, kt.val will be
NULL. But changing the condition to kt.val != NULL, will not do any harm.

Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Anoop C S <anoopcs@samba.org>
Autobuild-User(master): Anoop C S <anoopcs@samba.org>
Autobuild-Date(master): Thu Sep 25 07:13:28 UTC 2025 on atb-devel-224