Intersect segments between a line and a polygon (2D/3D): degenerate cases

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@22806 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
when decimal comma typed on numeric keypad on eg German keyboard, replace with .

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@22807 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e