make sure Polynomial * (eg) NumberValue works

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25774 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] (more fixes) make sure List/VectorValue +/- NumberValue works

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25775 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e