ds: dict: fix iterable_begin not setting iterator status

ds/dict.c

@@ -495,6 +495,7 @@ static b_iterator *iterable_begin(b_dict *dict)
 	if (dict_is_empty(it->_d_p)) {
 		it->item.key = NULL;
 		it->item.value = NULL;
+		b_iterator_set_status(it_obj, B_ERR_NO_DATA);
 		return it_obj;
 	}
 
@@ -504,6 +505,7 @@ static b_iterator *iterable_begin(b_dict *dict)
 	if (!first_bucket) {
 		it->item.key = NULL;
 		it->item.value = NULL;
+		b_iterator_set_status(it_obj, B_ERR_NO_DATA);
 		return it_obj;
 	}
 
@@ -513,6 +515,7 @@ static b_iterator *iterable_begin(b_dict *dict)
 	if (!first_item) {
 		it->item.key = NULL;
 		it->item.value = NULL;
+		b_iterator_set_status(it_obj, B_ERR_NO_DATA);
 		return it_obj;
 	}