Fix printf() being used instead of log_info()

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fio.c b/fio.c
index 3a53794..3f6a586 100644
--- a/fio.c
+++ b/fio.c
@@ -1560,7 +1560,7 @@
 						nr_thread > 1 ? "s" : "");
 		if (nr_process) {
 			if (nr_thread)
-				printf(" and ");
+				log_info(" and ");
 			log_info("%d process%s", nr_process,
 						nr_process > 1 ? "es" : "");
 		}