Fix panic when we cannot find self-id of probing nodes. This shouldn't happen as far as the self-id buffer is vaild but some people have this problem.
Fix panic when we cannot find self-id of probing nodes.
This shouldn't happen as far as the self-id buffer is vaild but
some people have this problem.

PR: kern/83999
Submitted by: Markus Wild <fbsd-lists@dudes.ch>
MFC after: 3 days

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