prepare for php5.5, re #4699

git-svn-id: svn://develop.studip.de/studip/trunk@31635 c5b85792-5220-0410-ad23-ed5b6b8ad999
more changes for php5.5, re #4699

git-svn-id: svn://develop.studip.de/studip/trunk@31636 c5b85792-5220-0410-ad23-ed5b6b8ad999