Fix #1354 (Error on uploading single book, because of missing rarfile)

cps/editbooks.py

@@ -453,7 +453,7 @@ def upload_single_file(request, book, book_id):
                 "<a href=\"" + url_for('web.show_book', book_id=book.id) + "\">" + uploadText + "</a>")
 
             return uploader.process(
-                saved_filename, *os.path.splitext(requested_file.filename))
+                saved_filename, *os.path.splitext(requested_file.filename), config.config_rarfile_location)
 
 
 def upload_cover(request, book):

cps/helper.py

@@ -292,6 +292,7 @@ def delete_book_file(book, calibrepath, book_format=None):
             for file in os.listdir(path):
                 if file.upper().endswith("."+book_format):
                     os.remove(os.path.join(path, file))
+            return True, None
         else:
             if os.path.isdir(path):
                 if len(next(os.walk(path))[1]):