CIFactor.1 (via Singular): fixing formerly overflowed int's

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31767 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
2-points-polygons case

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31768 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
CIFactor.1 (via Singular): another bigint conversion is required

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31769 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
pass U-turn start segments

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31770 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Dummy NPE

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31771 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e