DALLAS — It’s becoming difficult for the Red Wings to get a win. The winless streak reached three games Monday, as the Dallas Stars defeated the Wings 6-3. Joe Veleno’s power-play goal at 13:21 cut the Dallas lead to 4-3. But Michael Rasmussen’s tripping penalty put Dallas back on the power play, and Joe Pavelski quickly regained the two-goal lead for Dallas, 5-3, 30 seconds after Veleno scored. Miro Heiskanen clinched the outcome with an empty-net goal. Daniel Sprong and Jonatan Berggren added the Wings’ goals, but it wasn’t enough against a Dallas team that was smarting after an ugly loss at…