CID 331478: Null pointer dereferences (FORWARD_NULL)

This seems to be a result of 3e6fc49c:

*** CID 331478:  Null pointer dereferences  (FORWARD_NULL)
/lib/dns/keymgr.c: 1731 in keymgr_key_rollover()
1725     	/* It is time to do key rollover, we need a new key. */
1726     
1727     	/*
1728     	 * If rollover is not allowed, warn.
1729     	 */
1730     	if (!rollover) {
>>>     CID 331478:  Null pointer dereferences  (FORWARD_NULL)
>>>     Dereferencing null pointer "active_key".
1731     		dst_key_format(active_key->key, keystr, sizeof(keystr));
1732     		isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSSEC,
1733     			      DNS_LOGMODULE_DNSSEC, ISC_LOG_WARNING,
1734     			      "keymgr: DNSKEY %s (%s) is offline in policy %s, "
1735     			      "cannot start rollover",
1736     			      keystr, keymgr_keyrole(active_key->key),