YANPE (related to #4280)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36848 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Re-allocate buffers only if more memory needed

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36849 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e