reflog_expire(): never update a reference to null_sha1

diff --git a/commit.h b/commit.h
index cd35ac150acd076047eed2e3200d1be12e4e7d5e..5cc1e7ec9ee80965d1669e0f96dfeab03f3b0798 100644 (file)
--- a/commit.h
+++ b/commit.h
@@ -236,10 +236,13 @@ struct commit_graft *read_graft_line(char *buf, int len);
 int register_commit_graft(struct commit_graft *, int);
 struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
 
-extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
-extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup);
+extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2);
+extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos);
 extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
 
+/* To be used only when object flags after this call no longer matter */
+extern struct commit_list *get_merge_bases_many_dirty(struct commit *one, int n, struct commit **twos);
+
 /* largest positive number a signed 32-bit integer can contain */
 #define INFINITE_DEPTH 0x7fffffff