Fix infinite loop in Image::printIFDStructure (backport #1778)

[mergify]

This is an automatic backport of pull request #1778 done by Mergify.
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	both modified:   src/image.cpp

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[codecov]

Codecov Report

Merging #1780 (e4e3362) into main (0208b50) will increase coverage by 0.01%.
The diff coverage is 72.50%.

@@            Coverage Diff             @@
##             main    #1780      +/-   ##
==========================================
+ Coverage   67.48%   67.49%   +0.01%     
==========================================
  Files         151      151              
  Lines       20805    20815      +10     
==========================================
+ Hits        14041    14050       +9     
- Misses       6764     6765       +1     

Impacted Files	Coverage Δ
src/image.cpp	72.91% <72.50%> (+0.40%)	⬆️

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[lgtm-com]

This pull request introduces 1 alert and fixes 1 when merging e4e3362 into 0208b50 - view on LGTM.com

new alerts:

• 1 for Comparison result is always the same

fixed alerts:

• 1 for Multiplication result converted to larger type