In Taylor v. State, 180 Ga. App. 200-201 (1) (348 SE2d 582) (1986), defense counsel sought to cross-examine the victim concerning prior assaults by him upon the defendant. Taylor held that the trial court did not err in prohibiting this line of cross-examination, because the defendant had not made the three-part prima facie showing required for admission of such evidence. Taylor further noted, however, that because the defendant had later offered testimony to the same effect, any error in the trial court's ruling was harmless.