DALLAS — Vince Carter knew right away the exact date of the last time he had a buzzer-beating try in a playoff game — 13 years ago.It’s seared in the memory of the 16-year veteran because he missed that one. He was on target Saturday.Carter hit a double-pump 3-pointer at the buzzer to give the Dallas Mavericks a 109-108 victory in Game 3 and a first-round series lead over the top-seeded San Antonio Spurs.With 1.7 seconds left, Carter took an inbound pass from Jose Calderon in the left corner. After a quick pump fake got Manu Ginobili in the air — moments after the Argentine guard had given the Spurs the lead — Carter released the ball just in time.He strutted stone-faced toward Dirk Nowitzki, who was waving his arms wildly as he jumped on Carter.