Iterate over object ids instead of over object values.
Instead of using find, then spliting string, first split and compare with list items.
Check that *all* subparts of cell id are ints, not just the first one.
Remove unneeded value assignment.
Fix comment.
Clarify "try" structure: append is what must happen if no error is raised.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@18557 20353a03-c40f-0410-a6d1-a30d3c3de9de