[BUGFIX] Incompatibility with php 5.3


git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/df_tools/trunk@85510 735d13b6-9817-0410-8766-e36946ffe9aa
[TASK] Release of version 1.7.1


git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/df_tools/trunk@85511 735d13b6-9817-0410-8766-e36946ffe9aa