Failure to put job in add_job() failure case

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/init.c b/init.c
index b70ccaf..2fc7f07 100644
--- a/init.c
+++ b/init.c
@@ -355,7 +355,7 @@
 	td->io_ops = load_ioengine(td, engine);
 	if (!td->io_ops) {
 		log_err("fio: failed to load engine %s\n", engine);
-		return 1;
+		goto err;
 	}
 
 	if (td->use_thread)