entry = nss_ZNEW(store->arena, certificate_hash_entry);
entry = nss_ZNEW(cert->object.arena, certificate_hash_entry);
add_certificate_entry(  nssCertificateStore *store,  NSSCertificate *cert){    PRStatus nssrv;    certificate_hash_entry *entry;    entry = nss_ZNEW(store->arena, certificate_hash_entry);    if (!entry) {	return PR_FAILURE;    }    entry->cert = cert;    nssrv = nssHash_Add(store->issuer_and_serial, cert, entry);    if (nssrv != PR_SUCCESS) {	nss_ZFreeIf(entry);    }    return nssrv;}