CAS test update

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36397 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Avoid unnecessary MyError (related to the new Polynomial code)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36398 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e