Fix incorrect loop condition (backport #1752)

[mergify]

This is an automatic backport of pull request #1752 done by Mergify.
Cherry-pick of 86d0a1d has failed:

On branch mergify/bp/main/pr-1752
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Changes to be committed:
	new file:   test/data/issue_ghsa_mxw9_qx4c_6m8v_poc.jp2
	modified:   tests/bugfixes/github/test_issue_ghsa_8949_hhfh_j7rj.py
	new file:   tests/bugfixes/github/test_issue_ghsa_mxw9_qx4c_6m8v.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   src/jp2image.cpp

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[neheb]

nice

[kevinbackhouse]

Haha, I see it was already fixed on main.

[codecov]

Codecov Report

Merging #1755 (52b7300) into main (8c4d67c) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1755      +/-   ##
==========================================
+ Coverage   66.94%   67.08%   +0.14%     
==========================================
  Files         151      151              
  Lines       20794    20792       -2     
==========================================
+ Hits        13920    13949      +29     
+ Misses       6874     6843      -31     

Impacted Files	Coverage Δ
src/jp2image.cpp	84.49% <100.00%> (+7.88%)	⬆️

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