Comment #5 on issue 1225 by pekka.klarck: Support `Screenshot` library with IronPython
http://code.google.com/p/robotframework/issues/detail?id=1225
This issue was updated by revision 827878d5eb03. Added code to handle the exception. Now the error is reported as a warning. I believe that's a better solution than failing the whole test, and that's also more consistent with JVM giving us black images if there is no display.
