function modalLink() wrong(?)

output: a class="modal" rel="{handler:'iframe'}" without size X and Y

modify function __construct($args) :
$this->arg('modal_width' , null, $args, '800');
$this->arg('modal_height' , null, $args, '600');

The <%SELECTORS%>(rel) always {handler:'iframe'} without size X and Y, and preview not write filename etc.

Problem info :
- sandbox 2.5
- preview image modal
thumb size: 230x230 (or any size); center, crop, fit

FF distort image, IE original size

Fixed.