Tim Gray Senior Vice PresidentPamela Martin of Warner Bros.’ “King Richard,” says, “When it comes to editing, you have to love your characters, flawed or not. And I loved that family.”Before signing on, the editor says, “I knew very little about Richard Williams, and it was mostly filtered through the media: ‘That crazy tennis dad’ or ‘He’s a nut job.’ Now I think that guy’s a genius.”The Will Smith-starring film, which is an Oscar contender, concerns the early days of tennis champs Venus and