ANN ARBOR, Mich. — They weren’t half bad. Unfortunately for the UCLA Bruins, games last 40 minutes. After nearly matching second-ranked Michigan in the opening 20 minutes, the Bruins went splat over the latter half of what they hoped would be a showcase game. What everyone watching on national television saw, at least in the second half, wasn’t flattering. The Bruins couldn’t sustain the toughness they displayed early in falling, 86-56, Saturday at the Crisler Center to end a modest two-game