This also fixes a regression from commit
4342e22060,
which had made o2u_attachCurrentThread a no-op.
From 2006, this initialization had never been executed.
Is it unnecessary after all?
Change-Id: I2ff942a913fa844f5e4627ba23ca34d1b864846b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110217
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>