Issue with int8 for MaxPool

[taylding-amd]

Fixes #2991

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.15%. Comparing base (b9fe915) to head (9b4be19).
Report is 129 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3725      +/-   ##
===========================================
+ Coverage    92.05%   92.15%   +0.09%     
===========================================
  Files          509      514       +5     
  Lines        21014    21956     +942     
===========================================
+ Hits         19345    20234     +889     
- Misses        1669     1722      +53     

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