passing a reference to the userfunc

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/cal/trunk@81039 735d13b6-9817-0410-8766-e36946ffe9aa
fixed dateParser for negative year values

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/cal/trunk@81040 735d13b6-9817-0410-8766-e36946ffe9aa