[boost] [1.38][date_time] Permission to merge a trivial fix

Subject: [boost] [1.38][date_time] Permission to merge a trivial fix
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2009-01-29 12:50:23

Am I allowed to merge this change into the release branch?

https://svn.boost.org/trac/boost/changeset/50876

This is a trivial fix for missing #include. I ran tests locally, no 
problems occurred.