bitcoin/bitcoin — pull request #2850 by Diapolo (2013-07-23 11:11:43+00:00)
Title: fix possible thread deadlock in intro.cpp

- it was possible to trigger a thread deadlock in FreespaceChecker::check() by
simply removing the drive letter on Windows (which leads to an endless
loop in the FreespaceChecker thread)
- this was caused by not checking for valid data in parentDir

@laanwj Maybe we also should add a clearer message to this?