From 80ac250f8c9a468fbb0dd13e683a12964f6e0328 Mon Sep 17 00:00:00 2001
From: Matthias Andree <matthias.andree@gmx.de>
Date: Tue, 26 Jul 2005 16:00:42 +0000
Subject: Fix buffer underrun when buffer starts with whitespace.

svn path=/trunk/; revision=4183
---
 rfc822.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'rfc822.c')

diff --git a/rfc822.c b/rfc822.c
index 5e335616..99c78c0e 100644
--- a/rfc822.c
+++ b/rfc822.c
@@ -264,7 +264,8 @@ unsigned char *nxtaddr(const unsigned char *hdr /* header to be parsed, NUL to c
 	    state = ENDIT_ALL;
 	    if (tp)
 	    {
-		while (isspace(address[--tp]))
+		--tp;
+		while (tp >= 0 && isspace(address[tp--]))
 		    continue;
 		address[++tp] = '\0';
 		tp = 0;
-- 
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