fix assert for norm comparision (check for small difference instead of double equality). By Philippe.
fix assert for norm comparision (check for small difference instead of
double equality). By Philippe.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@4999 27541ba8-7e3a-0410-8455-c3a389f83636

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