TRatioPlot seg fault in PyROOT

ROOT
6

Hi, @couet. This was fixed in ROOT v6.09 (thanks!), however it still exists in ROOT v6.08.

I am noticing the same behavior we say back in December on lxplus with this configuration:

$ uname -a
Linux lxplus022.cern.ch 2.6.32-642.15.1.el6.x86_64 #1 SMP Fri Feb 24 16:56:37 CET 2017 x86_64 x86_64 x86_64 GNU/Linux
$ root-config --version
6.08/07
$ python --version
Python 2.7.13

Can the fix that you put into ROOT v6.09 also be applied to the patches for ROOT v6.08? I would like to use TRatioPlot in the ROOT v6.08 available on lxplus through CVMFS as described in this issue here.