Prototype example issue.

[bus710]

Don't know if I missed something from the book (if so, please let me know).

From the prototype example code, the first check fails so that I changed as I understand.

From

func GetShirtsCloner() ShirtCloner {
 return nil
}

To

func GetShirtsCloner() ShirtsCloner {
	return &ShirtsCache{}
}

Would anyone tell me if my thought on the code is right or wrong?

Thanks,