headp->generation = 1;
__db_txnlist_init(retp)	void *retp;{	__db_txnhead *headp;	if ((headp = (struct __db_txnhead *)	    __db_malloc(sizeof(struct __db_txnhead))) == NULL)		return (ENOMEM);	LIST_INIT(&headp->head);	headp->maxid = 0;	*(void **)retp = headp;	return (0);}