batman-adv: Use {} braces consistent on the arms of a statement

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 01b66d4..7f8e158 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -237,8 +237,9 @@
 				"old packet received, start protection\n");
 
 			return 0;
-		} else
+		} else {
 			return 1;
+		}
 	}
 	return 0;
 }