commit: add short-circuit to paint_down_to_common()

diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 27b2cc138e67c013adbee3cbe152ca48c3d82ff5..c1304234cd6feb07960cea1b8ad6b60fc7d2bf04 100644 (file)
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -578,11 +578,11 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
            get_object_mark(&commit->parents->item->object) != 0 &&
            !full_tree) {
                parse_commit_or_die(commit->parents->item);
-               diff_tree_oid(&commit->parents->item->tree->object.oid,
-                             &commit->tree->object.oid, "", &rev->diffopt);
+               diff_tree_oid(get_commit_tree_oid(commit->parents->item),
+                             get_commit_tree_oid(commit), "", &rev->diffopt);
        }
        else
-               diff_root_tree_oid(&commit->tree->object.oid,
+               diff_root_tree_oid(get_commit_tree_oid(commit),
                                   "", &rev->diffopt);
 
        /* Export the referenced blobs, and remember the marks. */