Minor fix.

git-svn-id: https://plugins.svn.wordpress.org/cleantalk-spam-protect/trunk@981097 b8457f37-d9ea-0310-8a92-e5e31aec5664
Custom contact forms logic fixed.

git-svn-id: https://plugins.svn.wordpress.org/cleantalk-spam-protect/trunk@981190 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed custom form antispam with AJAX requests.

git-svn-id: https://plugins.svn.wordpress.org/cleantalk-spam-protect/trunk@981257 b8457f37-d9ea-0310-8a92-e5e31aec5664