r21705 - gnucash/trunk/src/engine - Add setter function for invoice Opening Date using GDate.

[Christian Stimming]

Author: cstim
Date: 2011-12-10 16:10:05 -0500 (Sat, 10 Dec 2011)
New Revision: 21705
Trac: http://svn.gnucash.org/trac/changeset/21705

Modified:
   gnucash/trunk/src/engine/gncInvoice.c
   gnucash/trunk/src/engine/gncInvoice.h
Log:
Add setter function for invoice Opening Date using GDate.