from Text should be able to handle None values

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@2763 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Telephone.py

@@ -74,6 +74,8 @@ class Telephone(Coordinate, Base):
 
     security.declareProtected(Permissions.ModifyPortalContent, 'fromText')
     def fromText(self, coordinate_text,reindex_object=1):
+        if coordinate_text is None:
+            coordinate_text = ''
         if self.standard_parser.match(coordinate_text):
             (country, temp, area, number) = \
                 self.standard_parser.match(coordinate_text).groups()