Don't display " | Category :" if there is no category associated

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@39475 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_web_blog/SkinTemplateItem/portal_skins/erp5_web_blog/ListBox_viewAsBlog.xml

@@ -65,8 +65,8 @@
     <strong tal:content="structure date_rendered">date</strong>\n
   </small>\n
 \n
-  <small class="post_author">Author: <span tal:replace="author">Author</span></small> | <small class="post_category">Category: \n
-    <tal:block tal:repeat="category categories"><a tal:attributes="href python: \'%s?tag=%s\' % (base_url_string, category)" tal:content="category">cat.</a><tal:block tal:condition="not: repeat/category/end"> ; </tal:block></tal:block></small>\n
+  <small class="post_author">Author: <span tal:replace="author">Author</span></small><tal:block tal:condition="categories"> | <small class="post_category">Category: \n
+    <tal:block tal:repeat="category categories"><a tal:attributes="href python: \'%s?tag=%s\' % (base_url_string, category)" tal:content="category">cat.</a><tal:block tal:condition="not: repeat/category/end"> ; </tal:block></tal:block></small></tal:block>\n
 \n
 </div><!--End post_head -->\n
 \n

bt5/erp5_web_blog/bt/revision

-47
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+48
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