Sometimes RSS may not specify date.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@38829 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_knowledge_pad/SkinTemplateItem/portal_skins/erp5_gadget/RssFeed_getSummaryAsHTML.xml

@@ -38,7 +38,7 @@
 
 <tal:block \n
   tal:define="title here/field_title;\n
-              date here/field_date;\n
+              date here/field_date|nothing;\n
               description here/field_content;\n
               image here/field_img;\n
               other_links here/field_others_links;\n

bt5/erp5_knowledge_pad/bt/revision

-548
\ No newline at end of file
+549
\ No newline at end of file