Frederic Leroy's update to Dan Widyono's patch to compile cleanly on 64

[David Hampton]

Log Message:
-----------
Frederic Leroy's update to Dan Widyono's patch to compile cleanly on 64
bit systems.

Tags:
----
gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/backend/file/test:
        test-xml-transaction.c
    gnucash/src/business/business-core/file:
        gnc-bill-term-xml-v2.c
        gnc-tax-table-xml-v2.c
    gnucash/src/engine:
        Account.c
        Transaction.c
        cap-gains.c
        qof_book_merge.c
        qofquery.c
        qofsession.c
    gnucash/src/gnome:
        dialog-budget-workbench.c
    gnucash/src/gnome-utils:
        gnc-html.c
        gnc-plugin-menu-additions.c