Style fixes.

Style fixes pointed out by Axel. I'm rusty, and it shows.
Hope I got it right.
Also moved get_route() into BPrivate.

headers/private/net/RouteSupport.h

@@ -2,13 +2,21 @@
  * Copyright 2013, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  */
-
 #ifndef ROUTESUPPORT_H_
 #define ROUTESUPPORT_H_
 
+
 #include <ObjectList.h>
 
+
+namespace BPrivate {
+
+
 status_t get_routes(const char* interfaceName,
 		int family, BObjectList<route_entry>& routes);
 
+
+}
+
+
 #endif /* __ROUTESUPPORT_H_ */