From Andrei: a protectionagainst the crash due to the attempt of setting a name to a TGeoTrack having pdg=0.
From Andrei:
a protectionagainst the crash due to the attempt of setting a name to a TGeoTrack having pdg=0.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@16634 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT