Due to a string of unhelpful coincidences, _gpgrt_lock_init never
got called in libgpg-error for Windows; resulting in occasional
crashes.

Change-Id: I95f508e4622777c21f90c76dce5b5ff420c81fa1
Reviewed-on: https://gerrit.libreoffice.org/45191Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Siegmund Gorr <siegmund.gorr@cib.de>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>