From 520bf885be70b01837546cb3d5e40e05cdbdefed Mon Sep 17 00:00:00 2001
From: William San Filippo <wills@runtime.io>
Date: Thu, 9 Nov 2017 16:46:05 -0800
Subject: [PATCH] net/lora: Fix link check command failing

The changes to the code fix the problem with sending an app
link check. There was also a bug with the code that would
form a packet when only mac commands (a port 0 packet) were
contained in the message.

X-Original-Commit: 01e73022d9aa7eb5f73b7bdd8aa1fb128a7e44f8