An error occurred while fetching folder content.
if document is empty, don't try to convert.
Yusei Tahara authored
oood does not work for empty data, so it is waste of time.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@16148 20353a03-c40f-0410-a6d1-a30d3c3de9de
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