Title: wmi_cpuload: Added required tables to prevent crash
Level: 1
Component: checks
Class: fix
Compatible: compat
Edition: cre
State: unknown
Version: 1.2.8p23
Date: 1495631029

Until now the checkplugin created Services only if there are potential
instancesi regardless if the needed information to compute these instances
is available. This has been fixed now - Services are only created, if all
necessary data is available.
