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
 

sim/main.lua

@@ -290,7 +290,9 @@ while 1 do
 				for a = i+3, i+3+argc-1 do
 					argv[#argv+1] = collapseescape(data[a])
 				end
-				Simulation.queuegateinput(sim, gate, argv)
+				if gate then
+					Simulation.queuegateinput(sim, gate, argv)
+				end
 				
 				i = i+2+argc
 			elseif data[i] == "SAVE" then

sim/port.lua

@@ -32,18 +32,18 @@ function Port.new(self, type, direction, position, causeupdate)
 	return o
 end
 
-function Port.setstate(self, state)
-	if state ~= self.state then
-		self.state = state
-		Simulation.queuegroup(sim, self.group)
+function Port.setstate(port, state)
+	if state ~= port.state then
+		port.state = state
+		Simulation.queuegroup(sim, port.group)
 	end
 end
 
-function Port.setinputstate(self, state)
-	if state ~= self.state then
-		self.state = state
-		if self.causeupdate then
-			Simulation.queuegate(sim, self.gate)
+function Port.setinputstate(port, state)
+	if state ~= port.state then
+		port.state = state
+		if port.causeupdate then
+			Simulation.queuegate(sim, port.gate)
 		end
 	end
 end