csg_inverse: die - make error better readable
csg_inverse: die - make error better readable

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