Do not send action_off signal when newly placing nodes, this didn't

cause any bugs, but unneccessary sounds (experimental change)

mesecons/services.lua

@@ -28,13 +28,11 @@ mesecon.on_placenode = function (pos, node)
 	-- Effectors: Send changesignal and activate or deactivate
 	if mesecon.is_effector(node.name) then
 		local powered_rules = {}
-		local unpowered_rules = {}
 
 		-- for each input rule, check if powered
 		for _, r in ipairs(mesecon.effector_get_rules(node)) do
 			local powered = mesecon.is_powered(pos, r)
-			if powered then table.insert(powered_rules, r)
-			else table.insert(unpowered_rules, r) end
+			if powered then table.insert(powered_rules, r) end
 
 			local state = powered and mesecon.state.on or mesecon.state.off
 			mesecon.changesignal(pos, node, r, state, 1)
@@ -44,10 +42,6 @@ mesecon.on_placenode = function (pos, node)
 			for _, r in ipairs(powered_rules) do
 				mesecon.activate(pos, node, r, 1)
 			end
-		else
-			for _, r in ipairs(unpowered_rules) do
-				mesecon.deactivate(pos, node, r, 1)
-			end
 		end
 	end
 end