MIAMI — The Lakers crumbled down the stretch and their eight-game winning streak came to an end tonight against the Miami Heat. Kobe Bryant’s 3-pointer, one of only two baskets for him in the second half, tied the score at 88 with 2 minutes, 26 seconds remaining. But the Lakers never scored again. The Heat ended a five-game losing streak. Bryant scored 24 points on 8-for-21 shooting. Pau Gasol had 20 points and Andrew Bynum had 13 points and 12 rebounds. LeBron James had 19 points, including the go-ahead dunk with 1:27 left. Chris Bosh scored 24 and Dwyane Wade added 20 for Miami.