while (prop = icalcomponent_get_first_property(vtodo,
ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
i = icalproperty_get_sequence(prop);
while (prop = icalcomponent_get_first_property(vtodo,
ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
i = icalproperty_get_sequence(prop);