Please fix php warning issue.

Undefined variable $curr_id in /home/public_html/wp-content/plugins/maintenance/includes/functions.php on line 1059

define $curr_id at the top of the mtnc_check_exclude function as apparently the is another post or page besides is_page(), is_single(), is_home() & is_front_page()

also variable $cur_url is not used at all, but declared.

Please fix