Werk #2683: Fixed exceptions occuring in some ps checks

Component	Checks & agents
Title	Fixed exceptions occuring in some ps checks
Date	Oct 20, 2015
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i4 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

An exception like "'int' object is not iterable" could occur during execution of the ps checks.

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