Update canonmn_int.cpp to correct lens "Canon EF 80-200mm f/4.5-5.6 II"

[John55h]

This PR corrects exiv2 lens identification for "Canon EF 80-200mm f/4.5-5.6 II"
Canon Exif.CanonCs.LensType IDs 28 and 38 both get reported as Canon EF 80-200mm f/4.5-5.6

See: #1906

I have raised an issue with lensfun to correct their database and consider how they determine the lens from the metadata which Exiv2 parses correctly.
lensfun/lensfun#1484

[kmilos]

Thanks!

[codecov]

Codecov Report

Merging #1932 (a8ec0b0) into main (b27aa0b) will not change coverage.
The diff coverage is n/a.

❗ Current head a8ec0b0 differs from pull request most recent head 02d4073. Consider uploading reports for the commit 02d4073 to get more accurate results

@@           Coverage Diff           @@
##             main    #1932   +/-   ##
=======================================
  Coverage   61.13%   61.13%           
=======================================
  Files          96       96           
  Lines       19059    19059           
  Branches     9734     9734           
=======================================
  Hits        11651    11651           
  Misses       5092     5092           
  Partials     2316     2316           

Impacted Files	Coverage Δ
src/canonmn_int.cpp	64.51% <ø> (ø)

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[kmilos]

IMHO should be ok to backport to 0.27.5 as well...

[kevinbackhouse]

@kmilos: I have no objection to back-porting this. We might want to check what @clanmills thinks though. Just add a comment like this one to back-port.

[clanmills]

@kmilos, @kevinbackhouse, @John55h Thank You for working on this. Please submit a PR to branch 0.27-maintenance for this change to be included in v0.27.5 RC3 which I plan to build and release on 2021-09-30.

[kevinbackhouse]

@Mergifyio backport 0.27-maintenance

[mergify]

Command backport 0.27-maintenance: success

Backports have been created

• #1936 Update canonmn_int.cpp to correct lens "Canon EF 80-200mm f/4.5-5.6 II" (backport #1932) has been created for branch 0.27-maintenance