Three ex-workers at an agriculture plant were not wrongfully terminated for spilling the beans on their employer, the state’s top court has ruled.A unanimous Illinois Supreme Court held in a 10-page decision Thursday that the employees did not meet the proper standard of proof in their retaliatory discharge claim against the company. The three men argued Nashville, Ill.-based Precision Alliance Group fired them for telling another ex-employee about chronically underweight bags of soybeans. That person then told the state’s …