Werk #14468: Extension packages: Fix error on usage of "mkp show"

Component	User interface
Title	Extension packages: Fix error on usage of "mkp show"
Date	Aug 15, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0p10 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

If the command "mkp show" was used with mkp files like "my_mkp.mkp", the error "Cannot open package my_mkp.mkp: I/O operation on closed file" occurred.

To the list of all Werks