message: Flush coins cache also after transaction processing
diff: @@ -5680,6 +5680,7 @@ bool static ProcessMessage(CNode* pfrom, std::string strCommand, CDataStream& vR
  if (nDoS > 0)
  Misbehaving(pfrom->GetId(), nDoS);
  }
  + FlushStateToDisk(state, FLUSH_STATE_PERIODIC);
  }
  