Title: hp_proliant_temp: Fixed crash if thresholds are set manually
Level: 1
Component: checks
Class: fix
Compatible: compat
Edition: cre
State: unknown
Version: 1.2.8p26
Date: 1505738884

The device delivers optionally thresholds for it's parts. If not, -99 will
be that value. A service with that device threshold crashed if a user would
set up thresholds for it's own. This is now fixed.
