want vtkXRenderWindowInteractor::Start to return
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
If iren->Start() is called as part of another process, it doesn't seem possible to return from it in the X11 case without calling platform specific code. vtkXRenderWindowInteractor::TerminateApp calls exit() whereas the others exit the event loops.
Attached is a patch to fix this so it behaves the same as Win32/Carbon/Cocoa.