BUG: Can't set the CTF's range in older VTK versions, missed this in the last bugfix.
BUG: Can't set the CTF's range in older VTK versions, missed this in the
last bugfix.


dmsurti/mayavi,alexandreleroux/mayavi,liulion/mayavi,dmsurti/mayavi,alexandreleroux/mayavi,liulion/mayavi