Allow 0 level (one root only) quad trees.
Allow 0 level (one root only) quad trees.

rukistar/kanzi,Sputuks3/kanzi,rukistar/kanzi,Sputuks3/kanzi,sharkkid/kanzi,rzel/kanzi,sharkkid/kanzi,rzel/kanzi,rzel/kanzi,sharkkid/kanzi,Sputuks3/kanzi,rukistar/kanzi