fix bug that after a room add, the room id get removed from cache
fix bug that after a room add, the room id get removed from cache

wechaty/wechaty,zixia/wechaty,wechaty/wechaty,Chatie/wechaty,zixia/wechaty,Chatie/wechaty,lijiarui/wechaty,binsee/wechaty,mukaiu/wechaty,mukaiu/wechaty,binsee/wechaty,binsee/wechaty,wechaty/wechaty,Chatie/wechaty,lijiarui/wechaty,mukaiu/wechaty