message: Fix for potential race condition
diff: @@ -319,7 +319,7 @@ void CZnodeMan::CheckAndRemove()
  }
  {
  // no need for cm_main below
  - LOCK(cs);
  + LOCK2(cs_main, cs);
  std::map<uint256, std::pair< int64_t, std::set<CNetAddr> > >::iterator itMnbRequest = mMnbRecoveryRequests.begin();
  while(itMnbRequest != mMnbRecoveryRequests.end()){
  