Werk #7410: vbox_guest: Fixed handling of empty values

Component	Checks & agents
Title	vbox_guest: Fixed handling of empty values
Date	May 20, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0p17 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Empty agent output for "/VirtualBox/GuestInfo/OS/ServicePack" resulted in permanent state "No guest additions installed". This has been fixed.

To the list of all Werks