If the zone fill failed, then don't add the zone to the
exported VRML because it might not be correct.
Also test that the Python command in DIALOG_SCRIPTING worked.
This dialog actually isn't used anywhere currently, so it
could in theory be removed - but it is simple enough and
it provides a decent testing dialog that it is more work to remove
it.
jean-pierre charras
Ian McInerney
Thomas Pointhuber
Wayne Stambaugh
Miguel Angel Ajo