[boost][date_time]

Hi there,

I have a question about the boost::posix::time_duration class.  It has accessors such as:

- hours()

- minutes()

that return a data type of long.  I would have expected it to return a datatype of boost::int64_t (or boost::int32_t) because could there be a risk that the return value would cause an overflow on an 8 bit embedded platform.

Regards,

Michael