By: Addison Wylie I would love to see what writer/director Judd Apatow could do with a film that punches out after 90 minutes – including credits. This Is 40 starts out strong and funny, but is then torpedoed by needless subplots that are tediously stretched out causing the runtime to slowly expand. Apatow has shown with his previous directorial work that he loves to let his material breathe. Not in a pretentious way, but in…