From b542c8a090f880f63a91b6e2d6ed36636e8e3ce4 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 25 Jan 2010 09:29:24 -0700
Subject: [PATCH] Fix #4643 (Error converting .prc => .mobi)

---
 src/calibre/ebooks/mobi/mobiml.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/calibre/ebooks/mobi/mobiml.py b/src/calibre/ebooks/mobi/mobiml.py
index f958b63a12..9361d52d31 100644
--- a/src/calibre/ebooks/mobi/mobiml.py
+++ b/src/calibre/ebooks/mobi/mobiml.py
@@ -164,6 +164,8 @@ class MobiMLizer(object):
             parent = bstate.nested[-1] if bstate.nested else bstate.body
             indent = istate.indent
             left = istate.left
+            if isinstance(indent, basestring):
+                indent = 0
             if indent < 0 and abs(indent) < left:
                 left += indent
                 indent = 0