parse_commit_buffer(): notice NUL in the commit buffer

It is unusual to have NUL byte appear anywhere in the commit object.
Leave a note in the commit object if we notice such a case while parsing
the buffer for structural information, so that codepaths that want to be
extra careful can inspect it further.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/commit.h b/commit.h
index 009b113e5b..dd5e27802c 100644
--- a/commit.h
+++ b/commit.h
@@ -15,6 +15,10 @@ struct commit {
 	struct object object;
 	void *util;
 	unsigned int indegree;
+
+	unsigned flags;
+#define COMMIT_HAS_NUL       01
+
 	unsigned long date;
 	struct commit_list *parents;
 	struct tree *tree;