Fix possible panic in loadKmeshSendmsgObjects

[lec-bit]

What type of PR is this?
/kind bug

What this PR does / why we need it:
Fix possible panic in loadKmeshSendmsgObjects
Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[hzxuzhonghu]

/lgtm

This happened when i deleted the sys/fs/bpf dir, but unfortuanately the kmesh_version map still there, not sure why.

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hzxuzhonghu

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• OWNERS [hzxuzhonghu]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 52.07%. Comparing base (9db2d28) to head (c5b0842).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/bpf/bpf_kmesh_workload.go	0.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
pkg/bpf/bpf_kmesh_workload.go	60.45% <0.00%> (-0.20%)	⬇️

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