dlpolytrajectoryreader: fixed a typo
dlpolytrajectoryreader: fixed a typo

votca/csg,junghans/csg,junghans/csg,votca/csg,MrTheodor/csg,junghans/csg,MrTheodor/csg,junghans/csg,votca/csg,MrTheodor/csg,votca/csg,MrTheodor/csg,junghans/csg,junghans/csg,MrTheodor/csg