Fixed bug #17138: Superfluous backspace in Error Message if no Install Tool...

Fixed bug #17138: Superfluous backspace in Error Message if no Install Tool Password is set (Thanks to Sebastian Michaelsen)

git-svn-id: https://svn.typo3.org/TYPO3v4/Core/trunk@10138 709f56b5-9817-0410-a4d7-c38de5d9e867