NJ 105.5 – New Jersey’s bid to legalize sports gambling has endured defeat after defeat in the courts, but one big winner has emerged, at taxpayer expense – the law firm hired to help Gov. Chris Christie defend a lawsuit filed by the four major pro sports leagues and the NCAA. The firm – Gibson, Dunn & Crutcher – is the same one Christie hired, also with public money, to investigate the George Washington Bridge lane-closing scandal that is plaguing his administration. According to figures obtained by The Associated Press through a public records request, Gibson Dunn billed the state…