Error in bricks.bricktype_to_quad function

Hi.

I think there may be an error in bricks.bricktype_to_quad function, in chapter 2, item 5.

The function signature is: function bricks.bricktype_to_quad( bricktype )

However, bricktype is never used. Instead of it, id is used where bricktype should be.

Therefore, the function signature should be function bricks.bricktype_to_quad( id ).

I hope I have helped.

By the way, great job with this tutorial! Congrats! I am learning a lot with it.