Fix code to call the method instead pass the function

bt5/erp5_crm/SkinTemplateItem/portal_skins/erp5_crm/Entity_getDefaultSubstitutionDictFromEvent.xml

@@ -50,7 +50,7 @@
         </item>
         <item>
             <key> <string>_body</string> </key>
-            <value> <string>return {"social_title" : getattr(context, \'getSocialTitleTranslatedTitle\', \'\'),\n
+            <value> <string>return {"social_title" : getattr(context, \'getSocialTitleTranslatedTitle\', lambda x: \'\')(None),\n
   "title": context.getTitle(),\n
 }\n
 </string> </value>

bt5/erp5_crm/bt/revision

-609
+611
\ No newline at end of file