fix issue in New when creating concurrent-safety var for package gvar

[osgochina]

修复safe参数逻辑错误

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.06 🎉

Comparison is base (6a4e39e) 78.58% compared to head (906d1e3) 78.65%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2573      +/-   ##
==========================================
+ Coverage   78.58%   78.65%   +0.06%     
==========================================
  Files         630      630              
  Lines       51393    51506     +113     
==========================================
+ Hits        40388    40512     +124     
+ Misses       9016     9006      -10     
+ Partials     1989     1988       -1     

Flag	Coverage Δ
go-1.15-386	78.65% <100.00%> (?)
go-1.15-amd64	78.66% <100.00%> (?)
go-1.16-386	78.70% <100.00%> (?)
go-1.16-amd64	78.69% <100.00%> (?)
go-1.17-386	78.69% <100.00%> (+0.09%)	⬆️
go-1.17-amd64	78.69% <100.00%> (+0.08%)	⬆️
go-1.18-386	78.60% <100.00%> (+0.05%)	⬆️
go-1.18-amd64	78.60% <100.00%> (+0.03%)	⬆️

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Impacted Files	Coverage Δ
container/gvar/gvar.go	96.55% <100.00%> (ø)

... and 13 files with indirect coverage changes

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