bugfix by Humberto Pereira
bugfix by Humberto Pereira

git-svn-id: f1daae93ec50fd93b15e4810276f299070365e28@241 1aa58f4a-7d42-0410-adbc-911cccaed67c

rotula/pdfminer,euske/pdfminer,pdfminer/pdfminer.six,goulu/pdfminer