Chicago officials’ failure to help an employee with muscular dystrophy do his job could end up costing the city more than $1 million.George Ferguson worked as a watchman for the city for 18 years until he was forced to take unpaid medical leave.Ferguson’s supervisors contended he was physically unfit for duty after he fell while trying to get into a city van.But Ferguson maintained he could have performed his job if his supervisors had provided him with a reasonable accommodation — a smaller vehicle and a …