Fixed PHP Strict varnings
Fixed PHP Strict varnings

anttikekki/civicrm-paytrail-payment-processor,joumak/civicrm-paytrail-payment-processor,joumak/civicrm-paytrail-payment-processor,anttikekki/civicrm-paytrail-payment-processor,VihreatDeGrona/civicrm-paytrail-payment-processor,VihreatDeGrona/civicrm-paytrail-payment-processor