Fix case of monitored service in startplasma's shutdown
Startplasma monitors ksmserver and tears down the session if it goes away, to match previous behaviour and as some lockscreen bypass protection.
When we teardown our new binary plasma-shutdown appears, runs scripts and makes the final shutdown call. ksmserver could gracefully quit in the meantime, so startplasma guarded this case and waited till both names exited. However it contains a really stupid typo.