rem: opn_session_free((OpnSession *) session);
add: opn_session_free(session);
context: OPN_HANDLER(login_error){#ifdef OPENNAP_DEBUG	OPN->DBGFN(OPN, "login error: %s\n", packet->read);#endif	OPENNAP->sessions = list_remove(OPENNAP->sessions, session);	opn_session_free((OpnSession *) session);}