From 0e0b19c905d58f6795a57f8042a958a76dec7f60 Mon Sep 17 00:00:00 2001
From: Alexander Yakushev <yakushev.alex@gmail.com>
Date: Tue, 30 Nov 2010 07:32:37 +0200
Subject: Added a gag to prevent crashes on parsing errors

---
 utf8.lua | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'utf8.lua')

diff --git a/utf8.lua b/utf8.lua
index 3db6642..72177c2 100644
--- a/utf8.lua
+++ b/utf8.lua
@@ -100,6 +100,10 @@ end
 -- instead of bytes
 function utf8sub (s, i, j)
    j = j or -1
+
+   if i == nil then
+      return ""
+   end
    
    local pos = 1
    local bytes = string.len(s)
-- 
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