get_ref_dir(): change signature

diff --git a/builtin/diff.c b/builtin/diff.c
index 1118689fb246b864ce758039543327c4304cdaa4..0fe638fc45c780e53901b8be22d3b4d715be3c30 100644 (file)
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -182,7 +182,7 @@ static int builtin_diff_combined(struct rev_info *revs,
                hashcpy((unsigned char *)(parent + i), ent[i].item->sha1);
        diff_tree_combined(parent[0], parent + 1, ents - 1,
                           revs->dense_combined_merges, revs);
-       free(parent);
+       free((void *)parent);
        return 0;
 }