Fixed #13370 -- Corrected the handling of pickling for lazy() proxy objects....

Fixed #13370 -- Corrected the handling of pickling for lazy() proxy objects. Thanks to Alex Gaynor for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@13000 bcc190cf-cafb-0310-a4f2-bffc1f526a37