2001-09-26 Federico Mena Quintero <federico@ximian.com>
Fix the libical-related part of Ximian bug #7892.
* src/libical/icalduration.c (icaldurationtype_as_ical_string):
The correct string for zero seconds is "PT0S", not "PTS0". Also
handle "negative zero" durations.
* src/libical/icalvalue.c (icalvalue_new_from_string_with_error):
Use icalerrno to see if the duration string is invalid. We cannot
use icaldurationtype_is_null_duration() because a duration of zero
*is* valid, not an error (icalduration_type_from_string() returns
a zero duration on parse error, too).
svn path=/trunk/; revision=13172
6543d06edf