if (left_item)
{
SCM left_cause = left_item->get_property ("cause");
- Item *slur_cause = Item::unsmob (left_cause);
+ Item *slur_cause = unsmob<Item> (left_cause);
if (slur_cause == note_heads_[k])
{
note_heads_[k]->set_property ("span-start", SCM_BOOL_T);