In build scenarios, python modules may be missing from the build machine. Then, allow setup.py to carry on. bzr revid: p_christ@hol.gr-20090610173524-fmqucmype469zm9i
bzr revid: vyruss@hellug.gr-20090608003943-i0719tclkmxxztv1
bzr revid: p_christ@hol.gr-20090421090641-hav4l9vkdmvu8qdj