#4310 Merging to trunk.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33782 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #4311: Product[list, undefined] should be undefined (not 0, not 1)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33783 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e