Werk #12191: brocade_fcport: Fix crash when data missing

Component	Checks & agents
Title	brocade_fcport: Fix crash when data missing
Date	Mar 30, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p2 Checkmk Enterprise (CEE), Checkmk MSP (CME)

Check brocade_fcport crashed when if_info data was missing. Now, the check plugin isn't discovered in that case.

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