From 84296bfc2c435c5cd844275005c239647aed9868 Mon Sep 17 00:00:00 2001
From: Thilo Schulz <arny@ats.s.bawue.de>
Date: Thu, 1 Jun 2006 00:58:19 +0000
Subject: [PATCH] Fixed a crash in md4 routines when using them on files with
 zero length, reported by Lukasz Saduniowski.

---
 code/qcommon/md4.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/code/qcommon/md4.c b/code/qcommon/md4.c
index 2501b2b6..838b062e 100644
--- a/code/qcommon/md4.c
+++ b/code/qcommon/md4.c
@@ -159,10 +159,10 @@ static void mdfour_update(struct mdfour *md, byte *in, int n)
 {
 	uint32_t M[16];
 
-	if (n == 0) mdfour_tail(in, n);
-
 	m = md;
 
+	if (n == 0) mdfour_tail(in, n);
+
 	while (n >= 64) {
 		copy64(M, in);
 		mdfour64(M);