Upcoming events query products by category error

## Report a Bug **What exactly is going wrong?** there is an option in Myticket events upcoming to query products by category. Since this option is available in back-end but was never defined in widgets/myticket-events-upcoming.php, the option doesn’t work. **Error description** In order to make it work add to widgets/myticket-events-upcoming.php, line 22: if(strlen($instance['category']) > 0) { $myticket_args['product_cat'] = $instance['category']; }