reshuffle PVS
If a Cut node doesn't fail high after the first move (at full depth) then it becomes an All node, so that its children are Cut nodes.

4000 games in 6"+0.06"
1016-982-2002 [50.4%] LOS=77.7%

Result is within error bar, but thie patch is the right thing to do. If a Cut node doesn't cut in the vast majority of cases on the first move, then the move ordering is at fault, not the PVS.

signature = 5853493