Easy: ignore interfaces without addresses
Easy: ignore interfaces without addresses

Summary: for_each_localaddr() should skip over no address interfaces

Reviewed By: andreazevedo

Differential Revision: D3397197

fbshipit-source-id: d596cbf9241c8b1d5cd43ba16d5a967b60555b26

yqzhang/mcrouter,facebook/mcrouter,yqzhang/mcrouter,yqzhang/mcrouter,yqzhang/mcrouter,facebook/mcrouter,facebook/mcrouter,facebook/mcrouter