- Solve a problem when the directory name is similar to $ROOTSYS (e.g....

- Solve a problem when the directory name is similar to $ROOTSYS (e.g. /home/user/rootdev and /home/user/root, only "dev" was displayed, stripping off $ROOTSYS)
- Properly handle backslashes as directory separators on Windows


git-svn-id: http://root.cern.ch/svn/root/trunk@43362 27541ba8-7e3a-0410-8455-c3a389f83636