Werk #15620: check_http: Don't Crash with TypeError

Component	Checks & agents
Title	check_http: Don't Crash with TypeError
Date	May 31, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0p2 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

This werk fixes a regression introduced in 2.2.0.

If a user configured the option IP address family > Primary address family via the rule Check HTTP service, then the check would crash with

TypeError: 'NoneType' object is not subscriptable

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