BARCELONA — Latavious Williams misses American food. Ask him what he craves most and there’s no hesitation. “My Auntie’s barbecue,” says Williams. But as his Auntie fires up the grill in Starkville, Mississippi, Latavious is playing power forward for Joventut Badalona of the Spanish League. When his two cousins visit later this month, odds are they won’t be sneaking any ribs through customs, either. No matter. The 6-foot-8 Williams, who says he lost a ton of weight upon his arrival in Spain, says he