batman-adv: Make gateway_get_selected type safe

Make the return value explicit instead of (void *).
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>

net/batman-adv/gateway_client.c

@@ -42,7 +42,7 @@ static void gw_node_free_ref(struct gw_node *gw_node)
 		call_rcu(&gw_node->rcu, gw_node_free_rcu);
 }
 
-void *gw_get_selected(struct bat_priv *bat_priv)
+struct orig_node *gw_get_selected(struct bat_priv *bat_priv)
 {
 	struct gw_node *curr_gateway_tmp;
 	struct orig_node *orig_node = NULL;

net/batman-adv/gateway_client.h

@@ -24,7 +24,7 @@
 
 void gw_deselect(struct bat_priv *bat_priv);
 void gw_election(struct bat_priv *bat_priv);
-void *gw_get_selected(struct bat_priv *bat_priv);
+struct orig_node *gw_get_selected(struct bat_priv *bat_priv);
 void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node);
 void gw_node_update(struct bat_priv *bat_priv,
 		    struct orig_node *orig_node, uint8_t new_gwflags);