r20081 - gnucash/trunk/src/engine - Add function for creating a new copy of an existing GncInvoice.

[Phil Longstaff]

On Wed, 2011-01-12 at 15:40 -0500, Christian Stimming wrote:
> Author: cstim
> Date: 2011-01-12 15:40:51 -0500 (Wed, 12 Jan 2011)
> New Revision: 20081
> Trac: http://svn.gnucash.org/trac/changeset/20081
> 
> Modified:
>    gnucash/trunk/src/engine/gncInvoice.c
>    gnucash/trunk/src/engine/gncInvoice.h
> Log:
> Add function for creating a new copy of an existing GncInvoice.

In some places we have gncXxxCopy() and in some, gncXxxClone().  I don't
really care which, but we should standardize.

Phil