By Bonnie Stiernberg Howard Stern spent a good chunk of the ’90s saying some truly awful things about people who didn’t deserve it for shock value. His constant jokes about Lorena Bobbitt, for example — a woman who was repeatedly raped and beaten by her husband — have aged like milk. But in light of recent attention on Magic Johnson thanks to Winning Time and his forthcoming docuseries They Call Me Magic, one Stern incident in particular has resurfaced — his cringy interview with the Lakers legend from 1998. In the late ’90s, Johnson’s short-lived late-night talk show The Magic Hour (canceled …