eliminate RTT self-reduction

libi2pd/Streaming.cpp

@@ -435,7 +435,7 @@ namespace stream
 					LogPrint(eLogError, "Streaming: Packet ", seqn, "sent from the future, sendTime=", sentPacket->sendTime);
 					rtt = 1;
 				}
-				m_RTT = (m_RTT*seqn + rtt)/(seqn + 1);
+				m_RTT = std::round ((m_RTT*seqn + rtt)/(seqn + 1.0));
 				m_RTO = m_RTT*1.5; // TODO: implement it better
 				LogPrint (eLogDebug, "Streaming: Packet ", seqn, " acknowledged rtt=", rtt, " sentTime=", sentPacket->sendTime);
 				m_SentPackets.erase (it++);