Make old sha1 optional with git update-ref -d

diff --git a/xdiff-interface.h b/xdiff-interface.h
index fb742dbb6ba2125b970b9d9510e208ec99954a2d..f7f791d96b9a34ef0f08db4b007c5309b9adc3d6 100644 (file)
--- a/xdiff-interface.h
+++ b/xdiff-interface.h
@@ -13,6 +13,7 @@ struct xdiff_emit_state {
        unsigned long remainder_size;
 };
 
+int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *ecb);
 int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf);
 int parse_hunk_header(char *line, int len,
                      int *ob, int *on,