* list.pop() the unwanted items from object_id_split
* store explicitely int-converted coordinates while parsing the object_id:
  - we do not have to reconvert those later
  - we dont have to carry around len(object_id_split) and do potentially
    error-prone indice-related operations later on


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@32815 20353a03-c40f-0410-a6d1-a30d3c3de9de