add convenience method param() for PaginatorHelper

Similar to CakeRequest::query(), data(), Session/Cookie read() and other access methods, this seems to be a clean wrapper for the params of PaginatorHelper.
In my case

    $params = $this->Paginator->params();
    if (!empty($params['count'] && ...) {}

can then be the cleaner version

    if ($this->Paginator->param('count') > $x) {}

What do you think?