desktop: tweak xmlCleanupParser hack: disable on return from main
desktop: tweak xmlCleanupParser hack: disable on return from main

Lubos has apparently a case of xmlCleanupParser run as an atexit
handler, from KDE's Strigi library; hopefully this should help
to avoid the abort then.

Change-Id: I50d2e92e5078016943f71a62070743ab8d6628bb

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core