This filter allows you to filter discount arguments before we are updating the given discount.
|$discount_args||array||An array containing all the data that is used to update the discount.|
|$discount_id||integer||The id of the discount that will be updated.|
|$discount||object (EDD_Discount)||The EDD Discount object of the discount before its updated.|
$discount_args = apply_filters( 'wpwh/actions/edd_update_discount/filter_discount_arguments', $discount_args, $discount_id, $discount );