ATLANTA -- The San Francisco 49ers are going heavier at wide receiver and lighter on the defensive line in the NFC Championship Game.Translation: Justin Smith is healthy.The 49ers are keeping active five wide receivers, a relatively high number. They are keeping active four defensive linemen, a relatively low number.Smith, who played 91 percent of the defensive snaps against Green Bay in the divisional round, had not previously played since suffering an elbow/triceps injury against New England on Dec.