audio/vorbis/internal/stb: Bug fix: Make the package buildable only under 'js' environment

Building `syscall/js` itself can be done only under 'js'
environment.

See also https://travis-ci.org/hajimehoshi/ebiten/builds/526786060
This commit is contained in:
Hajime Hoshi 2019-05-01 17:48:37 +09:00
parent f984f5ada9
commit 2aa79e0aa4