If the whole of the land is adjudicated to the party who created a mineral right or to his successor, the right is not extinguished or otherwise affected and the mineral right owner has no interest in the proceeds of the sale. In such cases, the party to whom the land is adjudicated is entitled to a credit on the total purchase price equal to the proportionate value of the mineral right or interest therein.
La. R.S. § 31:187