fix: panic on node nil

[guilhem]

No description provided.

[codecov]

Codecov Report

Base: 68.90% // Head: 68.86% // Decreases project coverage by -0.04% ⚠️

Coverage data is based on head (ba270f5) compared to base (576b076).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #631      +/-   ##
==========================================
- Coverage   68.90%   68.86%   -0.05%     
==========================================
  Files         194      194              
  Lines       22180    22180              
==========================================
- Hits        15284    15275       -9     
- Misses       5832     5844      +12     
+ Partials     1064     1061       -3     

Flag	Coverage Δ
unittests	68.86% <ø> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/koordlet/runtimehooks/reconciler/reconciler.go	71.57% <0.00%> (-7.37%)	⬇️
...eduler/plugins/coscheduling/controller/podgroup.go	68.96% <0.00%> (-1.98%)	⬇️
pkg/util/httputil/reverseproxy.go	84.84% <0.00%> (+0.53%)	⬆️

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[jasonliu747]

/lgtm

[zwzhang0107]

/lgtm

[koordinator-bot]

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