Sanitize ROOT's message output to ascii, using repr() if it isn't.
Sanitize ROOT's message output to ascii, using repr() if it isn't.

This is necessary otherwise you get UnicodeDecodeErrors when opening
a corrupted ROOT file.

ndawe/rootpy,ndawe/rootpy,kreczko/rootpy,rootpy/rootpy,rootpy/rootpy,kreczko/rootpy,rootpy/rootpy,ndawe/rootpy,kreczko/rootpy