r21393 - gnucash/trunk/src - Introduce GncInvoiceType enum and start using it instead of the char based Invoice Type.

[Geert Janssens]

Author: gjanssens
Date: 2011-10-08 12:59:01 -0400 (Sat, 08 Oct 2011)
New Revision: 21393
Trac: http://svn.gnucash.org/trac/changeset/21393

Modified:
   gnucash/trunk/src/business/business-gnome/dialog-invoice.c
   gnucash/trunk/src/engine/gncInvoice.c
   gnucash/trunk/src/engine/gncInvoice.h
Log:
Introduce GncInvoiceType enum and start using it instead of the char based Invoice Type.
This also puts a first structure in place to add credit notes later on.