moved ConversionError to super class

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@13265 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5OOo/Document/OOoDocument.py

@@ -42,7 +42,7 @@ from Products.ERP5Type.Message import Message
 from Products.ERP5Type.Cache import CachingMethod
 from Products.ERP5Type.XMLObject import XMLObject
 from Products.ERP5.Document.File import File, stripHtml
-from Products.ERP5.Document.Document import ConversionCacheMixin
+from Products.ERP5.Document.Document import ConversionCacheMixin, ConversionError
 from Products.CMFCore.utils import getToolByName
 from Products.DCWorkflow.DCWorkflow import ValidationFailed
 
@@ -52,9 +52,6 @@ dec=base64.decodestring
 _MARKER = []
 
 
-class ConversionError(Exception):pass
-
-
 class OOoDocument(File, ConversionCacheMixin):
   """
     A file document able to convert OOo compatible files to