From valeriy Onuchin

- revert the latest Getline.c changes
- more mods in TGWin32::CloseDisplay methods.
  Calling   gVirtualX->CloseDisplay terminates server thread and
  switches ROOT to batch mode.


git-svn-id: http://root.cern.ch/svn/root/trunk@8101 27541ba8-7e3a-0410-8455-c3a389f83636