Refactor loop for warning issue 733

[ckormanyos]

Intended to handle #733

[ckormanyos]

Tested locally with:

g++ -std=c++20 -O3 -Wall -Wextra -Wpedantic -Wconversion -Wsign-conversion -Wshadow -Wuninitialized -Wunused-parameter -Wunreachable-code -Wswitch-default -Winit-self -Wundef

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.2%. Comparing base (32fef7c) to head (0ddffc2).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop    #737   +/-   ##
=======================================
  Coverage     96.2%   96.2%           
=======================================
  Files          300     300           
  Lines        31349   31349           
=======================================
  Hits         30139   30139           
  Misses        1210    1210           

Files with missing lines	Coverage Δ
include/boost/multiprecision/cpp_int/bitwise.hpp	85.2% <100.0%> (ø)

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