fix intermittent startup problem

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34436 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] fix for solve in ggb mode

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34437 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e