On Mon, Aug 20, 2012 at 11:17 AM, Markus Metz <markus.metz.giswork at gmail.com> wrote: ... > I agree because the test is usually if (opt->answer), that is if > answer != NULL, which is true if the answer is "" = '\0', IOW, "" > would be treated as a valid answer. Fixed in all branches and trunk. Markus