If any infant, who has contracted a loan which is void in law, agrees after he comes of age to pay any money which in whole or in part represents or is agreed to be paid in respect of any such loan, and is not a new advance, such agreement, and any instrument, negotiable or other, given in pursuance of or for carrying into effect such agreement, or otherwise in relation to the payment of money representing or in respect of such loan, shall, so far as it relates to money which represents or is payable in respect of such loan, and is not a new advance, be void absolutely as against all persons whomsoever.

For the purposes of this section any interest, commission, or other payment in respect of such loan shall be deemed to be a part of such loan.