Correct use of TChain with AddFriend()

Hi Philippe,

As I said above, I have put a minimal working code on lxplus.
So when you loop over the tree (.x run.cc) I print branches values from both trees. Those from the primary tree have correct values and those from the friends tree have their initialised values => their values are not read correctly (or at all). Commenting out
fChain->SetMakeClass(1);
make no difference.

Can you access the code i have put on lxplus? I can also attach it here if it is preferred.

Thanks for the help