Make sure that NULL-values for ratedobjectuid results in an error message

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/th_rating/trunk@85206 735d13b6-9817-0410-8766-e36946ffe9aa
upload as version 0.10.1

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/th_rating/trunk@85207 735d13b6-9817-0410-8766-e36946ffe9aa