extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
const char *base, struct diff_options *opt);
-extern int diff_tree_combined_merge(const unsigned char *sha1, const char *, int);
+extern int diff_tree_combined_merge(const unsigned char *sha1, const char *, int, int);
extern void diff_addremove(struct diff_options *,
int addremove,