r23070 - gnucash/trunk/src - Fix the crash that occurs when duplicating multiple invoices from Find results.

[Mike Alexander]

Author: mta
Date: 2013-06-29 01:57:35 -0400 (Sat, 29 Jun 2013)
New Revision: 23070
Trac: http://svn.gnucash.org/trac/changeset/23070

Modified:
   gnucash/trunk/src/business/business-gnome/dialog-invoice.c
   gnucash/trunk/src/business/business-ledger/gncEntryLedger.c
   gnucash/trunk/src/engine/gncEntry.c
   gnucash/trunk/src/engine/gncEntry.h
   gnucash/trunk/src/engine/gncInvoice.c
Log:
Fix the crash that occurs when duplicating multiple invoices from Find results.
The biggest problem was that it was adding an invoice's entries to both the old
and the new invoice when duplicating the invoice.