Fixes double usage of variable sumWeightedVotes

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/th_rating/trunk@85841 735d13b6-9817-0410-8766-e36946ffe9aa
Another bugfix

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/th_rating/trunk@85842 735d13b6-9817-0410-8766-e36946ffe9aa