Fixed the "post statuses" option. Now disabling a post status (e.g. "Draft") should take effect immediately. Previously it would only happen if the user clicked "Re-check all links", deactivated and reactivated the plugin, or disabled and re-enabled all post types.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@1025669 b8457f37-d9ea-0310-8a92-e5e31aec5664