A total no-brainer: The family of 17-month-old boy who was shot in the arm by an off-duty police officer has filed a notice of claim against the city. The Porcellini family will also pursue action against the NYPD and 24-year-old police officer Patrick Venetek. Last week, Venetek's service pistol fired through his Brooklyn apartment floor - right above the Porcellini's. The bullet passed through the Porcellini's ceiling and through the left forearm of little Jonathan,......