Fixed #2102 -- Template system 'for' loops now support generators. Thanks, dbm-django@mclachlan.com.au

git-svn-id: http://code.djangoproject.com/svn/django/trunk@3165 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/template/defaulttags.py

@@ -88,6 +88,8 @@ class ForNode(Node):
             values = []
         if values is None:
             values = []
+        if not hasattr(values, '__len__'):
+            values = list(values)
         len_values = len(values)
         if self.reversed:
             # From http://www.python.org/doc/current/tut/node11.html