Reverting last essential change for Botana's prover (giac). Pappus seems to behave differently with Cox's method (true) and normal method.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26803 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
null pointer fix (relative copy of Locatables)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26804 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e