&bytes[0] (std::vector) will crash if bytes has zero elements (backport #1789)

[mergify]

This is an automatic backport of pull request #1789 done by Mergify.

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[codecov]

Codecov Report

Merging #1798 (3892634) into main (7251a96) will increase coverage by 0.00%.
The diff coverage is 85.71%.

@@           Coverage Diff           @@
##             main    #1798   +/-   ##
=======================================
  Coverage   67.58%   67.58%           
=======================================
  Files         151      151           
  Lines       20903    20904    +1     
=======================================
+ Hits        14127    14128    +1     
  Misses       6776     6776           

Impacted Files	Coverage Δ
src/image.cpp	72.97% <85.71%> (+0.06%)	⬆️

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