fix default image

diff --git a/telemeta/views/epub.py b/telemeta/views/epub.py
index ab48c2d114ff272414a1daa3b08695f9aa2731d8..d5f6b6b8e0f4baad4cac80149b64c02640604d37 100644 (file)
--- a/telemeta/views/epub.py
+++ b/telemeta/views/epub.py
@@ -101,6 +101,8 @@ class BaseEpubMixin(TelemetaBaseMixin):
 
         for collection in self.collections:
             items = {}
+            default_image_added = False
+
             for item in collection.items.all():
                 if '.' in item.old_code:
                     id = item.old_code.split('.')[1]