adjust dom text for Y-coordinate error in older Graphviz versions
adjust dom text for Y-coordinate error in older Graphviz versions


git-svn-id: d236aa11b63010c45751038f21095274a1190d52@496 96afbf3d-d051-0410-af9b-0f47d9322047

svn2github/canviz,svn2github/canviz,svn2github/canviz