batman-adv: Clarify calculation precedence for '&' and '?'

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 9adbc61..753383c 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -479,7 +479,7 @@
 			   batadv_ogm_packet->orig,
 			   ntohl(batadv_ogm_packet->seqno),
 			   batadv_ogm_packet->tq, batadv_ogm_packet->ttl,
-			   (batadv_ogm_packet->flags & BATADV_DIRECTLINK ?
+			   ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ?
 			    "on" : "off"),
 			   hard_iface->net_dev->name,
 			   hard_iface->net_dev->dev_addr);