merge downstream 0.11.x

src/darksend.cpp

@@ -2168,8 +2168,15 @@ void ThreadCheckDarkSendPool()
 
         if(c % 60 == 0){
             vector<CMasterNode>::iterator it = vecMasternodes.begin();
+            //check them separately
             while(it != vecMasternodes.end()){
                 (*it).Check();
+                ++it;
+            }
+
+            //remove inactive
+            it = vecMasternodes.begin();
+            while(it != vecMasternodes.end()){
                 if((*it).enabled == 4 || (*it).enabled == 3){
                     LogPrintf("Removing inactive masternode %s\n", (*it).addr.ToString().c_str());
                     it = vecMasternodes.erase(it);
@@ -2182,7 +2189,6 @@ void ThreadCheckDarkSendPool()
             CleanTransactionLocksList();
         }
 
-
         //try to sync the masternode list and payment list every 20 seconds
         if(c % 5 == 0 && RequestedMasterNodeList <= 2){
             bool fIsInitialDownload = IsInitialBlockDownload();

src/main.cpp

@@ -1052,6 +1052,10 @@ bool AcceptableInputs(CTxMemPool& pool, CValidationState &state, const CTransact
             CCoinsViewMemPool viewMemPool(*pcoinsTip, pool);
             view.SetBackend(viewMemPool);
 
+            // do we already have it?
+            if (view.HaveCoins(hash))
+                return false;
+
             // do all inputs exist?
             // Note that this does not check for the presence of actual outputs (see the next check for that),
             // only helps filling in pfMissingInputs (to determine missing vs spent).

src/qt/sendcoinsdialog.cpp

@@ -465,7 +465,7 @@ void SendCoinsDialog::setBalance(qint64 balance, qint64 unconfirmedBalance, qint
 
 void SendCoinsDialog::updateDisplayUnit()
 {
-    setBalance(model->getBalance(), 0, 0, 0);
+    setBalance(model->getBalance(), model->getUnconfirmedBalance(), model->getImmatureBalance(), model->getAnonymizedBalance());
 }
 
 void SendCoinsDialog::processSendCoinsReturn(const WalletModel::SendCoinsReturn &sendCoinsReturn, const QString &msgArg)