From ddc50b7450d5defcd1e05732fb3502d230926731 Mon Sep 17 00:00:00 2001
From: Joshua Harlow <harlowja@yahoo-inc.com>
Date: Sun, 26 Aug 2012 15:11:41 -0700
Subject: Don't use the processed userdata if nothing is there.

---
 cloudinit/sources/__init__.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cloudinit/sources/__init__.py b/cloudinit/sources/__init__.py
index a1939d58..a3f4af1e 100644
--- a/cloudinit/sources/__init__.py
+++ b/cloudinit/sources/__init__.py
@@ -72,6 +72,8 @@ class DataSource(object):
         return None
 
     def _filter_userdata(self, processed_ud):
+        if not processed_ud:
+            return processed_ud
         idx = self.get_launch_index()
         if idx is None:
             return processed_ud
-- 
cgit v1.2.3