From a2aa56d2cbf9a6c12e834adce3c5154b82292f7f Mon Sep 17 00:00:00 2001
From: nyamatongwe <unknown>
Date: Mon, 4 Jun 2012 12:49:48 +1000
Subject: Validate length of deletion: negative values caused crashes.

---
 src/Document.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/Document.cxx b/src/Document.cxx
index 82b9e070b..73dfda547 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -751,7 +751,7 @@ void Document::CheckReadOnly() {
 // SetStyleAt does not change the persistent state of a document
 
 bool Document::DeleteChars(int pos, int len) {
-	if (len == 0)
+	if (len <= 0)
 		return false;
 	if ((pos + len) > Length())
 		return false;
-- 
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