NEW ORLEANS — Ron Artest wore a black T-shirt with the words “Go Loco” printed on it before today’s practice in preparation of Game 4 of the Lakers’ first-round playoff series against the Hornets on Sunday night at the New Orleans Arena. He insisted it was not the team’s slogan for the 2011 playoffs, although it might be too late for that after he talked about the team going loco during its victory in Game 3 on Friday. Stay tuned.