makernotes: workaround for Olympus header corruption (backport #2567)

[kmilos]

No description provided.

[codecov]

Codecov Report

Merging #2579 (04d3a7c) into 0.27-maintenance (c60285e) will decrease coverage by 1.11%.
The diff coverage is 0.00%.

❗ Current head 04d3a7c differs from pull request most recent head aa10013. Consider uploading reports for the commit aa10013 to get more accurate results

@@                 Coverage Diff                  @@
##           0.27-maintenance    #2579      +/-   ##
====================================================
- Coverage             59.92%   58.81%   -1.11%     
====================================================
  Files                   149      149              
  Lines                 23921    24474     +553     
  Branches              12664    12667       +3     
====================================================
+ Hits                  14334    14395      +61     
- Misses                 6692     7210     +518     
+ Partials               2895     2869      -26     

Impacted Files	Coverage Δ
src/makernote_int.cpp	68.73% <0.00%> (-1.13%)	⬇️

... and 99 files with indirect coverage changes

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[kevinbackhouse]

Is there a test image for this, so that we can fix the code coverage?

[kmilos]

See #2542 for constructing this error state, not quite sure how to set up the test just yet...