bufRead needs to be adjusted after seek() (backport #1790)

[mergify]

This is an automatic backport of pull request #1790 done by Mergify.
Cherry-pick of b3c63da has failed:

On branch mergify/bp/main/pr-1790
Your branch is ahead of 'origin/main' by 2 commits.
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You are currently cherry-picking commit b3c63dac.
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Changes to be committed:
	modified:   test/data/icc-test.out
	modified:   tests/bugfixes/redmine/test_issue_1247.py

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

Cherry-pick of b5cbb47 has failed:

On branch mergify/bp/main/pr-1790
Your branch is ahead of 'origin/main' by 6 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit b5cbb479.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

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

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[codecov]

Codecov Report

Merging #1799 (35a2b25) into main (01b109e) will increase coverage by 0.22%.
The diff coverage is 84.53%.

@@            Coverage Diff             @@
##             main    #1799      +/-   ##
==========================================
+ Coverage   67.63%   67.86%   +0.22%     
==========================================
  Files         151      151              
  Lines       20903    20847      -56     
==========================================
+ Hits        14138    14147       +9     
+ Misses       6765     6700      -65     

Impacted Files	Coverage Δ
src/jpgimage.cpp	86.36% <84.53%> (+8.12%)	⬆️
src/image.cpp	72.74% <0.00%> (-0.24%)	⬇️
src/actions.cpp	74.40% <0.00%> (+0.02%)	⬆️

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