Fix UB in hash-library

[sashashura]

Fix https://oss-fuzz.com/testcase-detail/5137689594429440 Apply stbrumme/hash-library#15

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9fbc712) 82.70% compared to head (ef95c92) 82.70%.
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1241   +/-   ##
=======================================
  Coverage   82.70%   82.70%           
=======================================
  Files         159      159           
  Lines       20329    20329           
  Branches     7687     7687           
=======================================
  Hits        16814    16814           
  Misses       2893     2893           
  Partials      622      622           

Flag	Coverage Δ
alpine317	72.32% <ø> (ø)
centos7	74.48% <ø> (ø)
fedora37	72.32% <ø> (+0.04%)	⬆️
macos-11	61.32% <ø> (ø)
macos-12	61.37% <ø> (ø)
macos-ventura	61.35% <ø> (ø)
mingw32	70.21% <ø> (-0.04%)	⬇️
mingw64	70.23% <ø> (-0.04%)	⬇️
npcap	83.24% <ø> (-0.05%)	⬇️
ubuntu1804	74.94% <ø> (ø)
ubuntu2004	73.10% <ø> (ø)
ubuntu2204	72.17% <ø> (ø)
ubuntu2204-icpx	59.27% <ø> (+0.04%)	⬆️
unittest	82.70% <ø> (ø)
windows-2019	83.27% <ø> (-0.03%)	⬇️
windows-2022	83.29% <ø> (-0.02%)	⬇️
winpcap	83.25% <ø> (-0.02%)	⬇️
xdp	∅ <ø> (∅)
zstd	73.72% <ø> (-0.04%)	⬇️

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