N.Y. Real Property Actions & Proceedings Law § 651

§ 651. Expiration of plaintiff's title before trial. If the right or\ntitle of the plaintiff expires after the commencement of the action but\nbefore the trial, and he would have been entitled to recover but for the\nexpiration, the verdict, report or decision shall be rendered according\nto the fact; and the plaintiff is entitled nevertheless to judgment for\nhis damages for the withholding of the property to the time when his\nright or title so expired.\n