ds: array: fix iterable_begin not setting iterator status

ds/array.c

@@ -371,6 +371,7 @@ static b_iterator *iterable_begin(b_object *obj)
 	if (it->_a_p->ar_len > 0) {
 		it->value = it->_a_p->ar_data[0];
 	} else {
+		b_iterator_set_status(it_obj, B_ERR_NO_DATA);
 		it->value = NULL;
 	}
 
@@ -389,6 +390,7 @@ static const b_iterator *iterable_cbegin(const b_object *obj)
 	if (it->_a_p->ar_len > 0) {
 		it->value = it->_a_p->ar_data[0];
 	} else {
+		b_iterator_set_status(it_obj, B_ERR_NO_DATA);
 		it->value = NULL;
 	}