Fixes for RoundupPageTemplate in engine_chameleon.py.

* Follow Chameleon API change
* Inherit from object

Author: xiaq

roundup/cgi/engine_chameleon.py

@@ -23,7 +23,7 @@ def get(self, name, extension=None):
         src, filename = find_template(self.dir, name, extension)
         return RoundupPageTemplate(self.loader.load(src))
 
-class RoundupPageTemplate():
+class RoundupPageTemplate(object):
     def __init__(self, pt):
         self._pt = pt
 
@@ -36,7 +36,7 @@ def translate(msgid, domain=None, mapping=None, default=None):
                          mapping=mapping, default=default)
             return unicode(result, client.translator.OUTPUT_ENCODING)
 
-        output = self._pt.render(None, translate, None, **c)
+        output = self._pt.render(None, translate, **c)
         return output.encode(client.charset)
 
     def __getitem__(self, name):