Required API change for new pattern matcher

Requiered by poll req opencog/atomspace#2571

opencog/attentionbank/bank/AFImplicator.cc

@@ -47,9 +47,8 @@ Handle af_bindlink(AtomSpace* as, const Handle& hbindlink)
 	// The result_list contains a list of the grounded expressions.
 	// (The order of the list has no significance, so it's really a set.)
 	// Put the set into a SetLink, cache it, and return that.
-	HandleSeq hs;
-	for (const auto& v: impl.get_result_set())
-		hs.push_back(HandleCast(v));
+	QueueValuePtr qv(impl.get_result_queue());
+	HandleSeq hs(qv->to_handle_seq());
 	Handle rewr(createUnorderedLink(std::move(hs), SET_LINK));
 	return as->add_atom(rewr);
 }