Error when using add more functionality in multi-page form

Hi,
I got this error while using this module in a multi-page form.

Warning: Invalid argument supplied for foreach() in element_children() (line 6557 of /includes/common.inc).

After exploring the code, I found that the following code in line 157 in webform_addmore.module file is responsible for the error:

foreach (element_children($element) as $key) {
        _webform_addmore_client_form_ajaxify($element[$key], $form_state);
      }

The error arises when the webform page element is passed to the function thus producing empty element which throws error in element_children function of common.inc

Attached is the patch to fix this.