Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/ronanguilloux/php-gpio/inspections/1115dd77-1c88-4880-88e4-d8d4c583ce78
Merge pull request #17 from ronanguilloux/scrutinizer-patch-3

Scrutinizer Auto-Fixes