Crown Zellerbach's right to conduct its annual shareholders meeting as originally scheduled was upheld today by the Nevada state Supreme Court, which overturned a lower court ruling that would have required a two-week delay . . . Xidex of Santa Clara, Calif., announced that it has completed the sale of its Seaborn division to Engineered Systems & Development of San Jose but did not disclose terms of the sale . . . Pepsico plans to repurchase up to 4.7 million common shares, or 5% of its 94 million shares outstanding . . . Shamrock Broadcasting, a Burbank holding company controlled by the Disney family, sold its 557,200 common shares, or 9.9%, of Orion Capital.