From 1b88faf7aea53a72a4906f48ec30f16f1c157503 Mon Sep 17 00:00:00 2001
From: Russell Belfer <rb@github.com>
Date: Thu, 3 Jan 2013 14:21:25 -0800
Subject: [PATCH] Fix oid tostr issue with NULL oid

I made a small change to the behavior of this code and apparently
got it wrong. Sigh.
---
 src/oid.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/oid.c b/src/oid.c
index bbdd8541b..474129b58 100644
--- a/src/oid.c
+++ b/src/oid.c
@@ -100,7 +100,10 @@ char *git_oid_tostr(char *out, size_t n, const git_oid *oid)
 
 	n--; /* allow room for terminating NUL */
 
-	if (n > 0 && oid != NULL) {
+	if (oid == NULL)
+		n = 0;
+
+	if (n > 0) {
 		git_oid_fmt(str, oid);
 		if (n > GIT_OID_HEXSZ)
 			n = GIT_OID_HEXSZ;