Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/ronanguilloux/php-gpio/inspections/0c15c464-429e-4e71-942f-bc7e5152a8fc

Enabled analysis tools:
 - PHP Analyzer
 - PHP PDepend
 - PHP Similarity Analyzer
 - PHP Change Tracking Analyzer
Merge pull request #12 from ronanguilloux/scrutinizer-patch-1

Scrutinizer Auto-Fixes