fix more oop and bugs

sim/group.lua

@@ -85,7 +85,7 @@ function Group.addport(self, port)
 	elseif port.type == PortTypes.input then
 		self.in_ports[port] = port
 		self.nin_ports = self.nin_ports + 1
-		port:setinputstate(self.state)
+		Port.setinputstate(port, self.state)
 	end
 end
 
@@ -138,11 +138,11 @@ function Group.setstate(self, state)
 	if state ~= self.state then
 		self.state = state
 		self.updatetick = sim.currenttick
-
+		
 		for k, port in pairs(self.in_ports) do
 			Port.setinputstate(port, state)
 		end
-
+		
 		Simulation.queuegroupfx(sim, self)
 	end
 end