James Posey played the entire fourth quarter against the Memphis Grizzlies because of his defense. Then he won the game with his offense. Posey made a driving layup with 1.1 seconds left as the New Orleans Hornets beat the Grizzlies 113-111 on Wednesday night. Chris Paul scored 10 of his 21 points in the last 4:20 and had 13 assists as the Hornets rallied from a late nine-point deficit to win it on…