The supervisor of a Hong Kong MTR station ended up in hospital after being attacked by anti-government protesters in the early hours of Thursday morning.Protesters cornered the man at Po Lam station demanding to know why it had been closed on Saturday, when police and demonstrators again clashed in the city.Police had to rescue the MTR Corporation employee, and the rail operator shut the station after officers had cleared protesters, who had again vandalised ticket machines and entry gates.“Our…