Xflow change: Empty buffers are now always returned as 'null'.
Xflow change: Empty buffers are now always returned as 'null'.

Thus, for the result there is no difference between no buffer defined and empty buffer.

ariyapour/xml3d.js,Fiware/webui.Xml3d.js,xml3d/xml3d.js,ariyapour/xml3d.js,CCLDESTY/xml3d.js,CCLDESTY/xml3d.js,Fiware/webui.Xml3d.js,xml3d/xml3d.js