Add nil check for ports (#3254)

lua/wire/wireshared.lua

@@ -616,26 +616,30 @@ if SERVER then
 
 	function WireLib._SetInputs(ent)
 		local eid = ent:EntIndex()
+		local inputs = ent.Inputs
+		if not inputs then return end
 
 		local ent_input_array = {}
 		ents_with_inputs[eid] = ent_input_array
 
-		for Name, CurPort in pairs_sortvalues(ent.Inputs, WireLib.PortComparator) do
+		for Name, CurPort in pairs_sortvalues(inputs, WireLib.PortComparator) do
 			ent_input_array[#ent_input_array+1] = { Name, CurPort.Type, CurPort.Desc or "", CurPort.Num }
 		end
-		SendPortInfo(WirePortQueue, eid, PORT_TYPE_INPUT, ent.Inputs)
+		SendPortInfo(WirePortQueue, eid, PORT_TYPE_INPUT, inputs)
 	end
 
 	function WireLib._SetOutputs(ent)
 		local eid = ent:EntIndex()
+		local outputs = ent.Outputs
+		if not outputs then return end
 
 		local ent_output_array = {}
 		ents_with_outputs[eid] = ent_output_array
 
-		for Name, CurPort in pairs_sortvalues(ent.Outputs, WireLib.PortComparator) do
+		for Name, CurPort in pairs_sortvalues(outputs, WireLib.PortComparator) do
 			ent_output_array[#ent_output_array+1] = { Name, CurPort.Type, CurPort.Desc or "", CurPort.Num }
 		end
-		SendPortInfo(WirePortQueue, eid, PORT_TYPE_OUTPUT, ent.Outputs)
+		SendPortInfo(WirePortQueue, eid, PORT_TYPE_OUTPUT, outputs)
 	end
 
 	function WireLib._SetLink(input)
@@ -645,10 +649,14 @@ if SERVER then
 	hook.Add("PlayerInitialSpawn", "wire_ports", function(ply)
 		local queue = WirePortQueue.plyqueues[ply]
 		for eid, _ in pairs(ents_with_inputs) do
-			SendPortInfo(queue, eid, PORT_TYPE_INPUT, Entity(eid).Inputs)
+			local ports = Entity(eid).Inputs
+			if not ports then continue end
+			SendPortInfo(queue, eid, PORT_TYPE_INPUT, ports)
 		end
 		for eid, _ in pairs(ents_with_outputs) do
-			SendPortInfo(queue, eid, PORT_TYPE_OUTPUT, Entity(eid).Outputs)
+			local ports = Entity(eid).Outputs
+			if not ports then continue end
+			SendPortInfo(queue, eid, PORT_TYPE_OUTPUT, ports)
 		end
 		WirePortQueue:flushQueue(ply, queue)
 	end)