custom_field_template_delete_post and is_numeric validation

Hello can the author add a is_numeric validation to the post_id of the custom_field_template_delete_post function?

I have this bug since some month but w.o answer : http://ww.wp.xz.cn/support/topic/custom-field-template-woocommerce-aution-trigger-warning?replies=1.

I could get around that with an is_numeric validation

function custom_field_template_delete_post($post_id) {
    global $wpdb;
    $options = $this->get_custom_field_template_data();

    if (is_numeric($post_id))
        $id = !empty($options['posts'][$post_id]) ? $options['posts'][$post_id] : '';

http://ww.wp.xz.cn/plugins/custom-field-template/