Fix DocumentProxyMixin.index_html

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34020 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Document.py

@@ -237,9 +237,9 @@ class DocumentProxyMixin:
 
   security.declareProtected(Permissions.AccessContentsInformation,
                             'index_html' )
-  def index_html(self, REQUEST, RESPONSE, format=None, **kw):
+  def index_html(self, REQUEST, RESPONSE, **kw):
     """ Only a proxy method """
-    self.getProxiedDocument().index_html(REQUEST, RESPONSE, format, **kw)
+    return self.getProxiedDocument().index_html(REQUEST, RESPONSE, **kw)
 
   security.declareProtected(Permissions.AccessContentsInformation,
                             'getProxiedDocument' )