In an action by a broker for commissions for making a sale of realty, where the defense set up in the answer was, that the broker was employed to sell the property upon the express understanding that any sale of the property would be subject to the approval of the owner's wife, and that the wife did not consent to the sale made by the broker, but disapproved of it, and refused to sign the deed, the issue to be determined was not, whether the sale made by the broker was subject to the wife's approval, but rather, whether or not authority to make a sale was conditioned upon the wife's approval. Baker & Go, v, DeVitt (Tex. Civ. App. '08), 110 S. W. 528.