Modify the algorithm computing the min/max of the scale in Z in functions THistPainter::PaintLego and THistPainter::PaintSurface. The new algorithm gives a better scale in case (zmax-zmin)/(zmax+zmin) is very small.
Modify the algorithm computing the min/max of the scale in Z in
functions THistPainter::PaintLego and THistPainter::PaintSurface.
The new algorithm gives a better scale in case (zmax-zmin)/(zmax+zmin)
is very small.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@1492 27541ba8-7e3a-0410-8455-c3a389f83636

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