DALLAS — Today was a travel day for the Lakers and the reporters who cover them. Nice flight to Dallas-Ft. Worth this morning, then got to the Hertz counter and they didn’t have enough cars for everyone who had a reservation. Wasn’t that a “Seinfeld” episode? Picked up the local newspaper and the beat writer called the Mavericks “heartless” and “gutless” after their loss Monday to the lowly Detroit Pistons. Mavs have lost six in a row. Ugly.