do not raise an error if preferred_html_style_acknowledgeable_message is

missing (this can happen when we update erp5_xhtml_style but don't
update erp5_knowledge_pad at the same time because erp5_knowledge_pad
has its own global_definitions).


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27378 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/template_erp5_xhtml_style.xml

@@ -129,7 +129,7 @@ IDEAS:\n
                   </tal:block>\n
                 </div>\n
                 <p class="clear"></p>\n
-                <tal:block tal:condition="preferred_html_style_acknowledgeable_message">\n
+                <tal:block tal:condition="preferred_html_style_acknowledgeable_message | nothing">\n
                   <div id="acknowledgeable_message_render">\n
                     <div tal:content="structure here/acknowledgeable_message_render"/>\n
                   </div>\n

product/ERP5/bootstrap/erp5_xhtml_style/bt/revision

-764
\ No newline at end of file
+765
\ No newline at end of file