Re-add a removed mutex

In commit b33fbd55d630, many getMutex() have been replaced by an equivalent
maMutex.
Only in place, the use of a mutex have been simply removed.

Restore it as done in all the other places

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Change-Id: Id85e74e166ec57dd37f8913f8ecf19e2b6465f8f
---
This patch is completely speculative. The removal of this mutex was maybe
done on purpose.
This only looks spurious to me.
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117402
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions