fix no elements

diff --git a/telemeta/util/unicode.py b/telemeta/util/unicode.py
index 0e9cc8bac00da86cabe2138cb56bca0e07b7325a..b5bf267accbd0692b3847b97158f8209bdb3159d 100644 (file)
--- a/telemeta/util/unicode.py
+++ b/telemeta/util/unicode.py
@@ -62,7 +62,8 @@ class UnicodeCSVWriter(object):
         self.line = 0
         self.elements = elements
         self.tags = []
-        self.get_tags(self.elements[0])
+        if self.elements:
+            self.get_tags(self.elements[0])
 
     def get_tags(self, element):
         _dict = element.to_dict_with_more()