Fix for a:x=0;b:y=0;Solve[{a,b}]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37544 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Turtle can get SVG image on desktop. (#4721)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37545 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] fix for distance(point(2,0),y=x^2)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37546 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e