BingDaily don't refresh every 3h

[demonran]

Hi ashfinal,
the BingDaily's init.lua has check if obj.last_pic ~= pic_name then , but bing response image url like /th?id=OHR.RainforestMoss_ROW3048000823_1920x1080.jpg&rf=LaDigue_1920x1080.jpg&pid=hp ,the lastPathComponent always return th
So, it does't refresh main screen.