Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/hayakawa/Risoluto-Core/inspections/1f77d963-4110-442e-b881-4d578f4d66a2

Enabled analysis tools:
 - PHP Analyzer
 - PHP PDepend
 - PHP Similarity Analyzer
 - PHP Change Tracking Analyzer
Update Session.php
Merge pull request #39 from hayakawa/scrutinizer-patch-1

Scrutinizer Auto-Fixes