Always set the corruption field

[FloSch62]

I do not see any reason why the setCorruption was untouched when >0
That also meant, a set to 0 was not possible

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.43%. Comparing base (1c9c561) to head (63396f6).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2487      +/-   ##
==========================================
- Coverage   52.48%   52.43%   -0.06%     
==========================================
  Files         172      172              
  Lines       17692    17692              
==========================================
- Hits         9285     9276       -9     
- Misses       7433     7439       +6     
- Partials      974      977       +3     

Files with missing lines	Coverage Δ
internal/tc/tc.go	72.52% <100.00%> (ø)

... and 2 files with indirect coverage changes

[hellt]

thnx!