ALBANY, Aug. 18 — Gov. George E. Pataki nominated an upstate Republican on Friday to be his fifth appointee on the seven-member Court of Appeals, moving to assure that his imprint on the state’s highest court will last long into the next governor’s term. The governor appointed Eugene F. Pigott Jr., the presiding justice of the appellate division in Buffalo, to fill the seat that is being vacated by Judge George Bundy Smith, whose 14-year term ends next month. Judge Smith had applied to be reappointed to a second term, but several legal experts said that his prospects were harmed...