degenerateConics test is back

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23248 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
null pointer fix

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23249 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e