Fixed PHP Strict warnings
Fixed PHP Strict warnings

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