MILWAUKEE—Officials called off a preseason game between the Milwaukee Bucks and Toronto Raptors because of concerns about the condition of the floor on Friday night.Officials stopped the game with 5:58 left in the first quarter after several players slipped on the court surface in the first few minutes of the game.After about 20 minutes’ worth of discussion, an announcement was made over the arena public address system that the game was not being played.It was the final preseason game for both teams.The Bucks were leading 14-9 when the game was stopped.