fix: attempting to unmarshall some arrays twice

[bdraco]

The loop would never be entered so it did not break but it would do some unneed dict lookups

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.96%. Comparing base (1aab230) to head (6237a47).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #380      +/-   ##
==========================================
+ Coverage   83.88%   83.96%   +0.08%     
==========================================
  Files          28       28              
  Lines        3381     3381              
  Branches      607      607              
==========================================
+ Hits         2836     2839       +3     
+ Misses        338      334       -4     
- Partials      207      208       +1     

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[codspeed-hq]

CodSpeed Performance Report

Merging #380 will not alter performance

_{Comparing fix_array (6237a47) with main (1aab230)}

Summary

✅ 3 untouched benchmarks