From b9159e5fe59f29ee668c34207fa629aa16e14155 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 13 Apr 2013 15:00:45 +0530
Subject: [PATCH] Polishing books: Fix polishing erroring out if the book being
 polished has no cover

---
 src/calibre/ebooks/oeb/polish/main.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/oeb/polish/main.py b/src/calibre/ebooks/oeb/polish/main.py
index 7ec34b5174..08b5004c91 100644
--- a/src/calibre/ebooks/oeb/polish/main.py
+++ b/src/calibre/ebooks/oeb/polish/main.py
@@ -175,7 +175,7 @@ def gui_polish(data):
     if not data.pop('metadata'):
         data.pop('opf')
     if not data.pop('do_cover'):
-        data.pop('cover')
+        data.pop('cover', None)
     file_map = {x:x for x in files}
     opts = ALL_OPTS.copy()
     opts.update(data)