[Prover] Minor changes to AlternativeBotana

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23328 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for commit 23328

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23329 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e