pg_upgrade: Clean up some redundant code

No need to call exit() after pg_fatal().  Clean up a few stragglers
for consistency.

src/bin/pg_upgrade/option.c

@@ -169,18 +169,12 @@ parseCommandLine(int argc, char *argv[])
 				 */
 			case 'p':
 				if ((old_cluster.port = atoi(optarg)) <= 0)
-				{
 					pg_fatal("invalid old port number\n");
-					exit(1);
-				}
 				break;
 
 			case 'P':
 				if ((new_cluster.port = atoi(optarg)) <= 0)
-				{
 					pg_fatal("invalid new port number\n");
-					exit(1);
-				}
 				break;
 
 			case 'r':

src/bin/pg_upgrade/pg_upgrade.c

@@ -105,11 +105,8 @@ main(int argc, char **argv)
 
 	/* Set mask based on PGDATA permissions */
 	if (!GetDataDirectoryCreatePerm(new_cluster.pgdata))
-	{
-		pg_log(PG_FATAL, "could not read permissions of directory \"%s\": %s\n",
+		pg_fatal("could not read permissions of directory \"%s\": %s\n",
 				 new_cluster.pgdata, strerror(errno));
-		exit(1);
-	}
 
 	umask(pg_mode_mask);