Fix controller stop command bug

lua_controller/controller.lua

@@ -398,6 +398,7 @@ end
 local function call_loop(pos, meta, elapsed)
 	local t = minetest.get_us_time()
 	local number = meta:get_string("number")
+	if meta:get_int("running") == STATE_RUNNING then
 		if Cache[number] or compile(pos, meta, number) then
 			local cpu = meta:get_int("cpu") or 0
 			local code = Cache[number].code
@@ -419,6 +420,7 @@ local function call_loop(pos, meta, elapsed)
 			end
 			return res
 		end
+	end
 	return false
 end