Don't start new groups for numjobs=

No point in doing that, and it makes two identical jobs behave
differently if typed manually or implicitly with numjobs=x

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/init.c b/init.c
index 047da8d..f721127 100644
--- a/init.c
+++ b/init.c
@@ -529,8 +529,7 @@
 	td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 	td->ddir_nr = td->o.ddir_nr;
 
-	if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
-	     && prev_group_jobs) {
+	if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 		prev_group_jobs = 0;
 		groupid++;
 	}