Change variable from long to time_t where they are passed by reference

to time().

usr.bin/last/last.c

@@ -75,7 +75,7 @@ ARG	*arglist;				/* head of linked list */
 LIST_HEAD(ttylisthead, ttytab) ttylist;
 
 struct ttytab {
-	long	logout;				/* log out time */
+	time_t	logout;				/* log out time */
 	char	tty[UT_LINESIZE + 1];		/* terminal name */
 	LIST_ENTRY(ttytab) list;
 };
@@ -164,7 +164,8 @@ wtmp()
 	struct utmp	*bp;			/* current structure */
 	struct ttytab	*tt, *ttx;		/* ttylist entry */
 	struct stat	stb;			/* stat of file for size */
-	long	bl, delta;			/* time difference */
+	long	bl;
+	time_t	delta;				/* time difference */
 	int	bytes, wfd;
 	char    *crmsg;
 	char ct[80];