db: fix Windows build after PR 2686

[canepat]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 50.60%. Comparing base (cd80428) to head (04ceed9).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
silkworm/db/datastore/domain_get_as_of_query.hpp	0.00%	1 Missing ⚠️
silkworm/db/datastore/history_get_query.hpp	0.00%	1 Missing ⚠️
silkworm/db/datastore/snapshots/basic_queries.hpp	0.00%	1 Missing ⚠️
...kworm/db/datastore/snapshots/history_get_query.hpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2689      +/-   ##
==========================================
- Coverage   50.61%   50.60%   -0.01%     
==========================================
  Files         809      809              
  Lines       53132    53132              
  Branches     8274     8274              
==========================================
- Hits        26892    26887       -5     
- Misses      23892    23898       +6     
+ Partials     2348     2347       -1     

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[battlmonstr]

What was the problem here? Some of that code existed from before.