THE HAGUE, Netherlands -- A 59-year-old man, described as an “incorrigible and calculating criminal” was convicted Friday of stealing a painting by Vincent van Gogh and another by Frans Hals from two Dutch museums last year, and sentenced to the maximum eight years in prison.Neither of the paintings, each worth several million euros (US dollars) has been recovered.The man, whose identity was not released in line with Dutch privacy rules, was found guilty of snatching the Van Gogh painting “The