Force invite remaining variable to be integer in Content\Widget
Force invite remaining variable to be integer in Content\Widget

- Addresses https://github.com/friendica/friendica/issues/7297#issuecomment-512786156

friendica/friendica,annando/friendica,friendica/friendica,friendica/friendica,fabrixxm/friendica,tobiasd/friendica,fabrixxm/friendica,fabrixxm/friendica,annando/friendica,tobiasd/friendica,annando/friendica,friendica/friendica,tobiasd/friendica,tobiasd/friendica,annando/friendica,friendica/friendica,fabrixxm/friendica,annando/friendica,tobiasd/friendica,fabrixxm/friendica