From: Jonathan McDowell <noodles@earth.li>
Date: Wed, 23 Sep 2020 08:14:38 +0000 (+0100)
Subject: Fix option parsing on some platforms (e.g. ARM)
X-Git-Url: https://the.earth.li/gitweb/?a=commitdiff_plain;h=21137fd11bb52ff1a24987c4f51946b85f6eb0af;hp=21137fd11bb52ff1a24987c4f51946b85f6eb0af;p=mqtt-arp.git

Fix option parsing on some platforms (e.g. ARM)

getopt_long returns an int, not a char, and on some platforms we hit
issues with the sign extension as a result. Do it properly.

Fixes #2
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