[boost] [DateTime] Cannot handle 64bit seconds

Hi, when transforming a unix time into a boost::posix_time::ptime, the value of the unix time is truncated to long in for method boost::posix_time::from_time_t. As a result, -4260211200 is represented by some ptime in the year 1971, but it should be 1835. Or, in other words Boost.DateTime has the year 2038 problem. Regards, Roland