Fix issue #697

Add `is_type_typeid` check to `does_field_type_allow_using`

src/check_type.cpp

@@ -110,6 +110,8 @@ bool does_field_type_allow_using(Type *t) {
 		return true;
 	} else if (is_type_array(t)) {
 		return t->Array.count <= 4;
+	} else if (is_type_typeid(t)) {
+		return true;
 	}
 	return false;
 }