FixForIAPTutorialIos9.3

//https://www.raywenderlich.com/105365/in-app-purchases-tutorial-getting-started

    private func failedTransaction(transaction: SKPaymentTransaction) {
        print("failedTransaction...")
        if transaction.error!.code != SKErrorCode.PaymentCancelled.rawValue {
            print("Transaction error: \(transaction.error!.localizedDescription)")
        }
        SKPaymentQueue.defaultQueue().finishTransaction(transaction)
    }