The code did acccount processing of an invaild timeout system
message as a valid timeout event.

Change-Id: I3c31f8b9cec592631b4089411163dadecffde816
Reviewed-on: https://gerrit.libreoffice.org/43529Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>