cland-tidy: simplify booleans

[neheb]

Found with readability-simplify-boolean-expr

Signed-off-by: Rosen Penev rosenp@gmail.com

[codecov]

Codecov Report

Merging #2369 (b0bbe6a) into main (84f566b) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##             main    #2369   +/-   ##
=======================================
  Coverage   63.48%   63.48%           
=======================================
  Files         119      119           
  Lines       20597    20597           
  Branches    10208    10208           
=======================================
  Hits        13076    13076           
  Misses       5392     5392           
  Partials     2129     2129           

Impacted Files	Coverage Δ
app/exiv2.cpp	62.54% <0.00%> (ø)
src/convert.cpp	51.40% <0.00%> (ø)
src/crwimage.cpp	70.51% <0.00%> (ø)
src/epsimage.cpp	1.76% <0.00%> (ø)
src/makernote_int.cpp	64.62% <0.00%> (ø)
src/olympusmn_int.cpp	40.79% <0.00%> (ø)
src/preview.cpp	46.63% <0.00%> (ø)
src/tags_int.cpp	77.90% <0.00%> (ø)

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[kmilos]

LGTM