Missing autocomplete_path field on creating new field.

There is no way to specify the autocomplete_path to autocomplete fields created by profile module.

The problem is that, when trying to extend this by hooks, for example:

function MYTHEME_user_register($form)
{
	$form['profile']['profile_city']['#autocomplete_path'] = 'profilecity/autocomplete';
	return drupal_render($form);
}

The JS field autocomplete.js is not appended, because there is a IF condition in includes/form.inc verifying if autocomplete_path is empty or invalid, before calling MYTHEME_user_register.

at line: ~2027

if ($element['#autocomplete_path'] && menu_valid_path(array('link_path' => $element['#autocomplete_path'])))

I think that a workaround for this, is create a way to user specify the autocomplete_path on a new field creation.