List match node

[Durman]

Problem statement

Two problems here.
The node can't work with empty objects. I would expect to get [[1, 1], [], [3, 3, 3]]
The second problem is that the node does not clean its previous result if in current execution the result is empty list. It steps into the break condition and sv_get is never reachable.

sverchok/nodes/list_main/match.py

Lines 127 to 131 in ce84c14

	for i, socket in enumerate(self.outputs):
	if i == len(out): # never write to last socket
	break
	if socket.is_linked:
	socket.sv_set(out[i])