From 5c6016239a3aba569386a4d9b1de67635139f963 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 17 Jan 2012 05:54:23 +0530
Subject: [PATCH] E-book viewer: Fix regression in 0.8.35 that caused viewer to
 raise an error on books that did not define a language

---
 src/calibre/gui2/viewer/javascript.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/calibre/gui2/viewer/javascript.py b/src/calibre/gui2/viewer/javascript.py
index ab8492dc6f..e092d55f14 100644
--- a/src/calibre/gui2/viewer/javascript.py
+++ b/src/calibre/gui2/viewer/javascript.py
@@ -73,6 +73,9 @@ class JavaScriptLoader(object):
             src = self.get(x)
             evaljs(src)
 
+        if not lang:
+            lang = 'en'
+
         def lang_name(l):
             l = l.lower()
             l = lang_as_iso639_1(l)