is invoked by the dbus daemon.
Prior to this fix, when a service was started by the dbus daemon,
the first dbus call sent to it was being held back till the next
dbus call was performed, resulting in a long timeout for the first
unhandled call and a delayed answer.
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 96f7e60908)