Modal Window JavaScript Error - dialog.options undefined 1.5 (B4)

Modal Window JavaScript Error - dialog.options undefined 1.5 (B4)


Line 346, dialog.options is undefined. Resorting this as a quick fix
<code>
            }, dialog && dialog.options ? dialog.options.overlay : ''));
            if (dialog && dialog.options) {
                dialog.options.bgiframe && $.fn.bgiframe && $el.bgiframe();
            }
</code>