merge with /dev/null as base, instead of punting O==empty case

diff --git a/object.h b/object.h
index 5af530da5decf0abbfafeee041143c0acd0d600a..6accda33d8c8d6b8ef33a4df50bf350d9f088dc6 100644 (file)
--- a/object.h
+++ b/object.h
@@ -17,6 +17,7 @@ struct object {
        void *util;
 };
 
+extern int track_object_refs;
 extern int nr_objs;
 extern struct object **objs;
 
@@ -41,6 +42,9 @@ void mark_reachable(struct object *obj, unsigned int mask);
 struct object_list *object_list_insert(struct object *item, 
                                       struct object_list **list_p);
 
+void object_list_append(struct object *item,
+                       struct object_list **list_p);
+
 unsigned object_list_length(struct object_list *list);
 
 int object_list_contains(struct object_list *list, struct object *obj);