更正实例属性名称

FworkSpider/feapder/buffer/item_buffer.py

@@ -28,7 +28,7 @@ class ItemBuffer(threading.Thread):
     dedup = None
 
     def __init__(self, redis_key, rabbitmq=None):
-        if not hasattr(self, "_table_item"):
+        if not hasattr(self, "_items_queue"):
             super(ItemBuffer, self).__init__()
 
             self._thread_stop = False