[jenkinsci/virtualbox-plugin] e21ab7: ensure backward compat

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/jenkinsci/virtualbox-plugin
  Commit: e21ab7bb56903cf4f838a28d3885a9a92e170515
      
https://github.com/jenkinsci/virtualbox-plugin/commit/e21ab7bb56903cf4f838a28d3885a9a92e170515
  Author: Gomez Henri <henri.go...@gmail.com>
  Date:   2012-10-07 (Sun, 07 Oct 2012)

  Changed paths:
    M plugin/src/main/java/hudson/plugins/virtualbox/VirtualBoxSlave.java

  Log Message:
  -----------
  ensure backward compat