fix: division by zero for PoolHandler (#14)

[samber]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (8b65932) to head (db38226).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pool.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #15   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files         11      11           
  Lines        285     287    +2     
=====================================
- Misses       285     287    +2     

Flag	Coverage Δ
unittests	0.00% <0.00%> (ø)

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