success is not called for elements where required:false

[AndrewRayCode]

I'm not sure if this is a bug or not. If you have rules that are such:

    var depends = function() {
        return false;
    };

    $('form').validate({
        rules: {
            field   : { email: true, required: depends }
        }
    });

even if the email validator passes, the success function is not called on the field. Not only that, but $('[name="field"']).valid() return 0.