From adedac675b11b86a04503c523343744bc4cc488a Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@comcast.net>
Date: Thu, 4 Nov 2010 14:23:47 +0000
Subject: [PATCH] Fix earlier mistake.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@36057 a592a061-630c-0410-9148-cb99ea01b6c8
---
 lib/lyx2lyx/lyx_2_0.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/lyx2lyx/lyx_2_0.py b/lib/lyx2lyx/lyx_2_0.py
index 33aba90487..27c4415c38 100644
--- a/lib/lyx2lyx/lyx_2_0.py
+++ b/lib/lyx2lyx/lyx_2_0.py
@@ -1207,10 +1207,13 @@ def revert_mhchem(document):
         i = 0
         while True:
             i = find_token(document.body, "\\begin_inset Formula", i)
+            if i == -1:
+               break
             line = document.body[i]
             if line.find("\\ce{") != -1 or line.find("\\cf{") != 1:
               mhchem = "on"
               break
+            i += 1
 
     if mhchem == "on":
         pre = ["% lyx2lyx mhchem commands",