Missing ‘use_compat’ key in [members-listing] shortcode

The ‘use_compat’ shortcode attribute key is missing from the $default_atts on the [members-listing] shortcode handler function, see here: https://plugins.trac.wordpress.org/browser/shortcodes-for-buddypress/trunk/public/class-shortcodes-for-buddypress-public.php#L366

Makes it not possible to use it with the shortcode like [members-listing use_compat=0] because it always ends up getting removed when the shortcode attributes are parsed with shortcode_atts() here: https://plugins.trac.wordpress.org/browser/shortcodes-for-buddypress/trunk/public/class-shortcodes-for-buddypress-public.php#L374