Re-fix clear_commit_marks().

Fix clear_commit_marks() enough to be usable in
get_merge_bases(), and retire now unused clear_object_marks().
Signed-off-by: NJunio C Hamano <junkio@cox.net>

commit.c

@@ -397,12 +397,13 @@ void clear_commit_marks(struct commit *commit, unsigned int mark)
 {
 	struct commit_list *parents;
 
-	parents = commit->parents;
 	commit->object.flags &= ~mark;
+	parents = commit->parents;
 	while (parents) {
 		struct commit *parent = parents->item;
-		if (parent && parent->object.parsed &&
-		    (parent->object.flags & mark))
+
+		/* Have we already cleared this? */
+		if (mark & parent->object.flags)
 			clear_commit_marks(parent, mark);
 		parents = parents->next;
 	}
@@ -1083,8 +1084,10 @@ struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2,
 	}
 
  finish:
-	if (cleanup)
-		clear_object_marks(PARENT1 | PARENT2 | STALE);
+	if (cleanup) {
+		clear_commit_marks(rev1, PARENT1 | PARENT2 | STALE);
+		clear_commit_marks(rev2, PARENT1 | PARENT2 | STALE);
+	}
 
 	return result;
 }

object.c

@@ -235,12 +235,3 @@ void add_object_array(struct object *obj, const char *name, struct object_array
 	objects[nr].name = name;
 	array->nr = ++nr;
 }
-
-void clear_object_marks(unsigned mark)
-{
-	int i;
-
-	for (i = 0; i < obj_hash_size; i++)
-		if (obj_hash[i])
-			obj_hash[i]->flags &= ~mark;
-}

object.h

@@ -84,6 +84,4 @@ int object_list_contains(struct object_list *list, struct object *obj);
 /* Object array handling .. */
 void add_object_array(struct object *obj, const char *name, struct object_array *array);
 
-void clear_object_marks(unsigned);
-
 #endif /* OBJECT_H */