From 3b63333cf272fae301e22e9a021f0bbf60d1c413 Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl@samba.org>
Date: Sat, 15 Mar 2008 21:47:22 +0100
Subject: [PATCH] Allocate one 0-byte in asprintf replacement when len==0

Some S3 code depends on this.
(cherry picked from commit dc3d5e16452bf30055638ba3cfe99097fb557156)
(This used to be commit 842d144b4fb0981250157f72956e732709663107)
---
 source4/lib/replace/snprintf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source4/lib/replace/snprintf.c b/source4/lib/replace/snprintf.c
index 9f8a7657e52..a174dcffed7 100644
--- a/source4/lib/replace/snprintf.c
+++ b/source4/lib/replace/snprintf.c
@@ -1264,7 +1264,7 @@ static int add_cnk_list_entry(struct pr_chunk_x **list,
 	VA_COPY(ap2, ap);
 	ret = vsnprintf(NULL, 0, format, ap2);
 	va_end(ap2);
-	if (ret <= 0) return ret;
+	if (ret < 0) return ret;
 
 	(*ptr) = (char *)malloc(ret+1);
 	if (!*ptr) return -1;