[#568] Fix to allow translations to be extracted

ckan/lib/jinja_extensions.py

@@ -93,6 +93,8 @@ def parse(self, parser):
         template_path = parser.filename
         # find where in the search path this template is from
         index = 0
+        if not hasattr(self, 'searchpath'):
+            return node
         for searchpath in self.searchpath:
             if template_path.startswith(searchpath):
                 break