Woocommerce float quantity issue with Paypal Standard

/*
 * Hack to overcome Paypal Standard Payment quantity integer/float issue
 */
add_filter( 'woocommerce_paypal_line_item', 'cncf_woo_paypal_line_item_alter', 10, 4 );

function cncf_woo_paypal_line_item_alter( $item, $item_name, $quantity, $amount ) {
    if ( is_float($quantity) ) {
        $item['quantity'] = $quantity;
    }
    return $item;
}

add_filter( 'woocommerce_paypal_args', 'cncf_woocommerce_paypal_args_alter', 10, 2 );

function cncf_woocommerce_paypal_args_alter( $args ) {
    global $woocommerce;

    $cart_items = $woocommerce->cart->get_cart();

    foreach ( $args as $key => $arg ) {
        if ( preg_match('/quantity_/', $key) ) {
            $index = substr($key, 9);
            if ( is_int($args['quantity_' . $index]) ) {
                foreach ($cart_items as $item) {
                    $productMetaNamePayPalKey = cncf_get_product_meta_key($item);
                    $productMetaNamePayPal = $productMetaNamePayPalKey;
                    if ( !is_int($item['quantity']) &&
                            $args['item_name_' . $index] == $productMetaNamePayPal &&
                            (int) $item['quantity'] == $args['quantity_' . $index] &&
                            (float) $item['data']->price == $args['amount_' . $index]
                    ) {
                        $quantity_suffix = '';
                        $args['quantity_' . $index] = $item['quantity'];
                    }
                }
            }
            if ( !is_int($args['quantity_' . $index]) ) {
                $args['amount_' . $index] = round($args['amount_' . $index] * $args['quantity_' . $index], 2);
                $args['item_name_' . $index] = cncf_get_product_name($args, $index, isset($quantity_suffix) ? $quantity_suffix : '');
                $args['quantity_' . $index] = 1;
            }
        }
    }

    return $args;
}

function cncf_get_product_meta_key( $item ) {
    if ( !empty($item['variation_id']) ) {
        return $item['variation_id'];
    } else {
        return $item['product_id'];
    }
}

function cncf_get_product_name ( $args, $index, $quantity_suffix = null ) {

    if ( !empty($quantity_suffix) ) {
        return $args['item_name_' . $index] . ' x ' . $args['quantity_' . $index] . ' ' . $quantity_suffix;
    }

    return $args['item_name_' . $index] . ' x ' . $args['quantity_' . $index];
}