BUGFIX NID Alloc/Realloc/Dealloc during decode or encode

[gatekeep]

Summary

Simple bug fix to correct a situation where we are alloc or dealloc the NID arrays during a decode or encode.

• Instead of performing costly memory dealloc and alloc, check if inner NID data array is alloc'ed, clear and rewrite it, if it isn't alloc'ed, alloc it and write it.
• This will also hopefully correct strange crash conditions when the NAC changes during operation.

Component(s)

Which part(s) of the project does this affect?

• dvmhost
• dvmfne
• dvmbridge
• dvmpatch
• dvmcmd
• sysview
• tged
• peered
• Other (explain below)

Type of change

• Bug fix
• Refactor / cleanup
• Performance improvement
• Documentation update
• Build / tooling change

Related issues

N/A

Build & test notes

• Debian 12
• GCC 12.2.0

Checklist

• Change is scoped and focused
• Existing functionality verified
• No unrelated refactors included
• Documentation updated if needed
• No secrets or credentials included

Notes for maintainers

N/A