"An attack on an indictment is waived when its validity is not challenged in the trial court. State v. Wallace, 351 N.C. 481, 503, 528 S.E.2d 326, 341, cert. denied, 531 U.S. 1018, 148 L. Ed. 2d 498 (2000). "However, where an indictment is alleged to be invalid on its face, thereby depriving the trial court of its jurisdiction, a challenge to that indictment may be made at any time, even if it was not contested in the trial court. Id.