It's not often you turn on the TV in Omaha and find that a TV reporter has actually done a real investigation. (We're not counting the "Welfare-Abusing, Chain-Smoking Extra-Ginormous Legumes" stories we get during sweeps as "real.")But that's what Channel 3 viewers saw on Monday at 5 p.m. when Kathy Sarantos-Niver delved into the topic of battered men. If the veteran reporter is to be believed,