From de7d35026f95a99fa36264c4291d420a7bcc5e9d Mon Sep 17 00:00:00 2001
From: crs23 <crs23@dada9524-7633-0410-b979-e1680937827e>
Date: Mon, 10 Sep 2007 01:23:40 +0000
Subject: [PATCH] Applied patch 1547642, fixing a bug where we try to access
 elements in an empty std::list.

---
 lib/io/CStreamBuffer.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/io/CStreamBuffer.cpp b/lib/io/CStreamBuffer.cpp
index 2f10cac2..d11494b4 100644
--- a/lib/io/CStreamBuffer.cpp
+++ b/lib/io/CStreamBuffer.cpp
@@ -37,6 +37,12 @@ CStreamBuffer::peek(UInt32 n)
 {
 	assert(n <= m_size);
 
+	// if requesting no data then return NULL so we don't try to access
+	// an empty list.
+	if (n == 0) {
+		return NULL;
+	}
+
 	// reserve space in first chunk
 	ChunkList::iterator head = m_chunks.begin();
 	head->reserve(n + m_headUsed);