Fixed bug #3069: Extension manager crashed because of some PHP bug with...

Fixed bug #3069: Extension manager crashed because of some PHP bug with version_compare() (thanks to Rainer Haertlein who discovered the solution to this problem)

git-svn-id: https://svn.typo3.org/TYPO3v4/Core/trunk@1975 709f56b5-9817-0410-a4d7-c38de5d9e867