It was a family affair on New Year's Day when Navy Lt. Cmdr. Bryan Heller was sworn in as full commander by his older brother, U.S. Rep. Dean Heller.Cmdr. Heller, 39, flew into Reno on New Year's Eve on leave from duty in Bahrain. The congressman had arranged to give his brother the oath of his new office in Gov. Jim Gibbons' office at the Capitol.Though military officers who are promoted are usually sworn in by their commanders, Rep. Heller said it's not unusual for Congressmen to swear in officers."But it's probably unusual for a brother to swear in a …