When any district attorney is suspended, the court shall appoint a district attorney pro tem, who shall perform the duties of the office of district attorney and receive $25.00 per day while engaged in court, to be paid on the warrant of the Comptroller drawn on the treasurer, the clerk of the court having first certified to the Comptroller in writing the number of days such district attorney pro tem was engaged in court, from such appointment until the original order suspending the district attorney shall be set aside.