On Tuesday, American hoops fans can redeem a March Madness Dunk for a free small fry and a Frosty. Thanks to Michigan’s Roddy Gale dunking during Monday night’s NCAA men’s national title game in Indianapolis, Wendy’s will give fans of either team a small order of fries and a free small Frosty. Read Next: If You’re 40+ and Have a Mortgage, These 10 Steps Could Save You $71,000 All you need to do is…