Makes some cleanup/review in gittutorial

diff --git a/builtin-fast-export.c b/builtin-fast-export.c
index f171ee4a2beb3cfd6eec203f422799249508ee13..6731713223d4df24614417cc4285cbee793151d3 100644 (file)
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -221,7 +221,8 @@ static void handle_commit(struct commit *commit, struct rev_info *rev)
        if (message)
                message += 2;
 
-       if (commit->parents) {
+       if (commit->parents &&
+           get_object_mark(&commit->parents->item->object) != 0) {
                parse_commit(commit->parents->item);
                diff_tree_sha1(commit->parents->item->tree->object.sha1,
                               commit->tree->object.sha1, "", &rev->diffopt);