[parrot/parrot] 7f1ef0: Fix a wrong assertion

[GitHub]

  Branch: refs/heads/threads
  Home:   https://github.com/parrot/parrot
  Commit: 7f1ef0e72db425a30490b6365522a0c283491ee0
      https://github.com/parrot/parrot/commit/7f1ef0e72db425a30490b6365522a0c283491ee0
  Author: Stefan Seifert <nine at detonation.org>
  Date:   2012-03-31 (Sat, 31 Mar 2012)

  Changed paths:
    M src/thread.c

  Log Message:
  -----------
  Fix a wrong assertion