Fix the use of the deprecated mesecon.addPosRule API function in the switchtorch

moremesecons_switchtorch/init.lua

@@ -94,7 +94,8 @@ minetest.register_abm({
 	action = function(pos, node)
 		local is_powered = false
 		for _, rule in ipairs(torch_get_input_rules(node)) do
-			if mesecon.is_power_on(mesecon.addPosRule(pos, rule)) then
+			local src = vector.add(pos, rule)
+			if mesecon.is_power_on(src) then
 				is_powered = true
 				break
 			end