ensure that when the editeng GlobalEditData dtor is called
that the vtable of the xForbiddenCharsTable shared_ptr will
point to functions that are callable from editeng.

otherwise a shared_ptr created in the sw uwriter cppunit test,
but now belonging to GlobalEditData, will have deleter entries
pointing to functions in uwriter that have been unloaded and
are not available anymore

Change-Id: I375a84156c0b1a0f8b24194fc07f0c512f556dbc
Reviewed-on: https://gerrit.libreoffice.org/39605Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>