From ead9081318aa17a9b90e26061ca79946e7fa7ca9 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Tue, 6 Aug 2013 16:45:49 +0000
Subject: [PATCH] One more defensive assert, just to be sure.

[originally from svn r9997]
---
 sshbn.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sshbn.c b/sshbn.c
index 1c5c46a1..a5e0552f 100644
--- a/sshbn.c
+++ b/sshbn.c
@@ -607,6 +607,7 @@ static void internal_add_shifted(BignumInt *number,
     addend = (BignumDblInt)n << bshift;
 
     while (addend) {
+        assert(word <= number[0]);
 	addend += number[word];
 	number[word] = (BignumInt) addend & BIGNUM_INT_MASK;
 	addend >>= BIGNUM_INT_BITS;