correctly release segments

transport/internet/kcp/connection.go

@@ -414,6 +414,7 @@ func (this *Connection) Input(data []byte) int {
 			}
 			this.sendingWorker.ProcessReceivingNext(seg.ReceivinNext)
 			this.receivingWorker.ProcessSendingNext(seg.SendingNext)
+			seg.Release()
 		default:
 		}
 	}

transport/internet/kcp/sending.go

@@ -292,6 +292,8 @@ func (this *SendingWorker) ProcessAck(number uint32) {
 }
 
 func (this *SendingWorker) ProcessSegment(current uint32, seg *AckSegment) {
+	defer seg.Release()
+
 	this.Lock()
 	defer this.Unlock()