Fix font-optimizer for Perl 5.18.

[librarian.git] / librarian / epub.py

diff --git a/librarian/epub.py b/librarian/epub.py
index c126e78..f63826f 100644 (file)
--- a/librarian/epub.py
+++ b/librarian/epub.py
@@ -451,6 +451,8 @@ def transform(wldoc, verbose=False, style=None, html_toc=False,
         style = get_resource('epub/style.css')
     zip.write(style, os.path.join('OPS', 'style.css'))
 
+    if cover is None:
+        cover = WLCover
     if cover:
         if cover is True:
             cover = WLCover