[OpenSmalltalk/opensmalltalk-vm] a4fa7f: Suppress rtprio warning when ${CI} env var is set

 
  Branch: refs/heads/suppress-rtprio-warning
  Home:   https://github.com/OpenSmalltalk/opensmalltalk-vm
  Commit: a4fa7fef570d8888d37c8921ecef44798b148a09
      https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/a4fa7fef570d8888d37c8921ecef44798b148a09
  Author: Fabio Niephaus <[hidden email]>
  Date:   2018-08-19 (Sun, 19 Aug 2018)

  Changed paths:
    M platforms/unix/vm/sqUnixHeartbeat.c

  Log Message:
  -----------
  Suppress rtprio warning when ${CI} env var is set

${CI} is usually set by common CI providers, see:
- https://docs.travis-ci.com/user/environment-variables/#default-environment-variables
- https://www.appveyor.com/docs/environment-variables/
- https://docs.gitlab.com/ee/ci/variables/#predefined-variables-environment-variables

Closes #275



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