omit "AttributeError: 'NoneType' object has no attribute 'replace'" error in log.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26955 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_web/SkinTemplateItem/portal_skins/erp5_web/WebPage_viewEditor/my_text_content.xml

@@ -136,7 +136,7 @@
       <dictionary>
         <item>
             <key> <string>_text</string> </key>
-            <value> <string>python: (lambda x: field.get_value(\'text_editor\') == \'fck_editor\' and x.replace(\'\\\\\', \'\\\\\\\\\') or x)(here.getTextContent())</string> </value>
+            <value> <string>python: (lambda x: field.get_value(\'text_editor\') == \'fck_editor\' and x.replace(\'\\\\\', \'\\\\\\\\\') or x)(here.getTextContent() or \'\')</string> </value>
         </item>
       </dictionary>
     </pickle>

bt5/erp5_web/bt/revision

-808
+809
\ No newline at end of file