While the amount of the exemplary damages need not be proved, the plaintiff must show that he is entitled to moral, temperate or compensatory damages before the court may consider the question of whether or not exemplary damages should be awarded. In case liquidated damages have been agreed upon, although no proof of loss is necessary in order that such liquidated damages may be recovered, nevertheless, before the court may consider the question of granting exemplary in addition to the liquidated damages, the plaintiff must show that he would be entitled to moral, temperate or compensatory damages were it not for the stipulation for liquidated damages.