fix build for GOARCH=386

[visualfc]

No description provided.

[codecov-commenter]

Codecov Report

Merging #544 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #544   +/-   ##
=======================================
  Coverage   89.88%   89.88%           
=======================================
  Files          40       40           
  Lines       10190    10190           
=======================================
  Hits         9159     9159           
  Misses        752      752           
  Partials      279      279           

Impacted Files	Coverage Δ
exec/bytecode/gopkg.go	88.37% <100.00%> (ø)

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