Reset entry in TBranchProxy::Notify.
Reset entry in TBranchProxy::Notify.

Without this, reading the same entry in 2 consecutive file (without reading any other entries
in between) fails thanks to the optimization avoiding to call GetEntry a 2nd time on the same
entry.

root-mirror/root,olifre/root,olifre/root,karies/root,karies/root,karies/root,olifre/root,karies/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root,olifre/root,olifre/root,olifre/root,root-mirror/root,karies/root,karies/root,root-mirror/root,karies/root,karies/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,olifre/root