New Warriors coach Mark Jackson has insisted all season his club is headed in a winning direction despite a losing record.The reason? In a word: Defense.Jackson's philosophy was put to the ultimate test Tuesday night, not because the Warriors faced a powerhouse opponent, but rather because they revisited their offensive-minded past when former coach Keith Smart brought the Kings to town.For one night, anyway, it appears Jackson was on the money. The improved Golden State defense got the better of Smart's offense in a 93-90 home victory. Warriors owner Joe Lacob, who sat courtside for the game, made it clear beforehand the reason Jackson is coaching his team this season, and not Smart, is because a franchise that has made the playoffs just one time in the...