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Kazuhiko Shiozaki authored
frame (i.e. page number here) argument can be 0, so 'if frame' phrase will ignore frame=0 argument, and it will convert all pages, that can use too much memory. git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29403 20353a03-c40f-0410-a6d1-a30d3c3de9de
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