fix: file not closed after CreateFile

[eiixy]

bugfix: #790

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.88%. Comparing base (774fc9d) to head (4d1e19e).
Report is 27 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #798      +/-   ##
==========================================
+ Coverage   98.46%   98.88%   +0.42%     
==========================================
  Files          24       26       +2     
  Lines        1364     1344      -20     
==========================================
- Hits         1343     1329      -14     
+ Misses         15        9       -6     
  Partials        6        6              

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[sashabaranov]

Great catch, thank you!