merge-base: do not leak commit list

Signed-off-by: Junio C Hamano <junkio@cox.net>

commit.c

@@ -1012,14 +1012,16 @@ void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
 	free(nodes);
 }
 
-/* merge-rebase stuff */
+/* merge-base stuff */
 
 /* bits #0..15 in revision.h */
 #define PARENT1		(1u<<16)
 #define PARENT2		(1u<<17)
 #define STALE		(1u<<18)
 #define RESULT		(1u<<19)
 
+static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
+
 static struct commit *interesting(struct commit_list *list)
 {
 	while (list) {
@@ -1084,6 +1086,7 @@ static struct commit_list *merge_bases(struct commit *one, struct commit *two)
 	}
 
 	/* Clean up the result to remove stale ones */
+	free_commit_list(list);
 	list = result; result = NULL;
 	while (list) {
 		struct commit_list *n = list->next;
@@ -1099,7 +1102,6 @@ struct commit_list *get_merge_bases(struct commit *one,
 				    struct commit *two,
                                     int cleanup)
 {
-	const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
 	struct commit_list *list;
 	struct commit **rslt;
 	struct commit_list *result;