Replace unportable and overflow-prone use of 'long long' with safer

'double' arithmetic, per recent discussion.

contrib/pg_autovacuum/pg_autovacuum.c

@@ -978,7 +978,7 @@ main(int argc, char *argv[])
 	db_info    *dbs;
 	tbl_info   *tbl;
 	PGresult   *res = NULL;
-	long long	diff = 0;
+	double		diff;
 	struct timeval now,
 				then;
 
@@ -1151,14 +1151,14 @@ main(int argc, char *argv[])
 
 		/* Figure out how long to sleep etc ... */
 		gettimeofday(&now, 0);
-		diff = (now.tv_sec - then.tv_sec) * 1000000 + (now.tv_usec - then.tv_usec);
+		diff = (int) (now.tv_sec - then.tv_sec) * 1000000.0 + (int) (now.tv_usec - then.tv_usec);
 
-		sleep_secs = args->sleep_base_value + args->sleep_scaling_factor * diff / 1000000;
+		sleep_secs = args->sleep_base_value + args->sleep_scaling_factor * diff / 1000000.0;
 		loops++;
 		if (args->debug >= 2)
 		{
 			sprintf(logbuffer,
-			 "%i All DBs checked in: %lld usec, will sleep for %i secs.",
+			 "%i All DBs checked in: %.0f usec, will sleep for %i secs.",
 					loops, diff, sleep_secs);
 			log_entry(logbuffer);
 		}

contrib/pgbench/pgbench.c

 /*
- * $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.29 2003/11/29 19:51:35 pgsql Exp $
+ * $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.30 2003/12/07 19:55:58 tgl Exp $
  *
  * pgbench: a simple TPC-B like benchmark program for PostgreSQL
  * written by Tatsuo Ishii
@@ -261,14 +261,14 @@ doOne(CState * state, int n, int debug, int ttype)
 				 */
 				if (use_log)
 				{
-					long long	diff;
+					double	diff;
 					struct timeval now;
 
 					gettimeofday(&now, 0);
-					diff = (now.tv_sec - st->txn_begin.tv_sec) * 1000000 +
-						(now.tv_usec - st->txn_begin.tv_usec);
+					diff = (int) (now.tv_sec - st->txn_begin.tv_sec) * 1000000.0 +
+						(int) (now.tv_usec - st->txn_begin.tv_usec);
 
-					fprintf(LOGFILE, "%d %d %lld\n", st->id, st->cnt, diff);
+					fprintf(LOGFILE, "%d %d %.0f\n", st->id, st->cnt, diff);
 				}
 
 				res = PQgetResult(st->con);