r18925 - gnucash/trunk/src/engine - Add getter/setter for transaction posted-date as a GDate.

[Christian Stimming]

Author: cstim
Date: 2010-03-17 15:23:40 -0400 (Wed, 17 Mar 2010)
New Revision: 18925
Trac: http://svn.gnucash.org/trac/changeset/18925

Modified:
   gnucash/trunk/src/engine/Transaction.c
   gnucash/trunk/src/engine/Transaction.h
Log:
Add getter/setter for transaction posted-date as a GDate.

In addition to the known timespec, the date is also stored
as a kvp_value of TYPE_GDATE so that we know afterwards this
date has really been set as a date.