From 97b5f2571e3989f54057408b8ccede8b97de00ff Mon Sep 17 00:00:00 2001
From: Rob Crittenden <rcritten@redhat.com>
Date: Wed, 17 Feb 2010 11:54:07 -0500
Subject: [PATCH] Don't iterate over empty values in List params

---
 ipalib/parameters.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ipalib/parameters.py b/ipalib/parameters.py
index e0b0ed2c5..3911d6e93 100644
--- a/ipalib/parameters.py
+++ b/ipalib/parameters.py
@@ -1276,7 +1276,7 @@ class List(Param):
         super(List, self).__init__(name, *rules, **kw)
 
     def normalize(self, value):
-        if not isinstance(value, tuple):
+        if value and not isinstance(value, tuple):
             reader = self.__unicode_csv_reader([value])
             value = []
             for row in reader: