->ddir_nr must be 1 by default, otherwise we'll do sequential IO
if no :foo postfix is appended.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/options.c b/options.c
index 7d4396e..bbb3099 100644
--- a/options.c
+++ b/options.c
@@ -32,7 +32,7 @@
 	struct thread_data *td = data;
 	char *nr = get_opt_postfix(str);
 
-	td->o.ddir_nr = 0;
+	td->o.ddir_nr = 1;
 	if (nr)
 		td->o.ddir_nr = atoi(nr);