Werk #6110: inv_if: Don't return Unknown if no data for OID 1.3.6.1.2.1.2.1.0 is present

Component	HW/SW inventory
Title	inv_if: Don't return Unknown if no data for OID 1.3.6.1.2.1.2.1.0 is present
Date	May 18, 2018
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) 1.5.0b5 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.4.0p34 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Previously, the scan function raised a TypeError if no data was delivered for OID 1.3.6.1.2.1.2.1.0 which resulted in an UNKNOWN status of the HW/SW Inventory service. Now, a missing value indicates that the inventory function should not be executed.

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