From 7ec7ed499ee714b3ebc739c6073313b4cd945aeb Mon Sep 17 00:00:00 2001
From: Roberto Rosario <Roberto.Rosario.Gonzalez@gmail.com>
Date: Mon, 7 Nov 2011 02:05:06 -0400
Subject: [PATCH] Detect invalid transformation argument and reset to empty
 list []

---
 apps/converter/api.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/apps/converter/api.py b/apps/converter/api.py
index 82d183bdc0..bdcfe40f77 100644
--- a/apps/converter/api.py
+++ b/apps/converter/api.py
@@ -67,6 +67,8 @@ def convert(input_filepath, output_filepath=None, cleanup_files=False, *args, **
     rotation = kwargs.get('rotation', DEFAULT_ROTATION)
     page = kwargs.get('page', DEFAULT_PAGE_NUMBER)
     transformations = kwargs.get('transformations', [])
+    if transformations is None:
+        transformations = []
 
     unoconv_output = None