Shannen Doherty’s friends thought she had “more time” left before her cancer death. The ‘Beverly Hills, 90210’ actress died on 13 July 53 after losing her years-long battle with cancer, leaving her pals devastated – and her former ‘Charmed’ co-star Holly Marie Combs, 50, has now told how they were working together on the new podcast ‘The House of Halliwell’ with fellow cast members Brian Krause and Drew Fuller from the hit supernatural TV show in the weeks before Shannen’s death. Holly said during a special tribute edition of the podcast in honour of Shannen: “That’s one of the saddest parts t…