Merge bug fixes (#1260)

* Fix for incorrect locking in GetPubKey() (keystore.cpp)

* Fix Cmd-Q / Menu Quit shutdown on OSX

* Addition of ImmatureCreditCached to MarkDirty()

To protect against possible invalidation and to bring conformity to the code.

src/keystore.cpp

@@ -19,6 +19,7 @@ bool CBasicKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) con
 {
     CKey key;
     if (!GetKey(address, key)) {
+        LOCK(cs_KeyStore);
         WatchKeyMap::const_iterator it = mapWatchKeys.find(address);
         if (it != mapWatchKeys.end()) {
             vchPubKeyOut = it->second;

src/qt/dash.cpp

@@ -411,6 +411,7 @@ void BitcoinApplication::createSplashScreen(const NetworkStyle *networkStyle)
     splash->setAttribute(Qt::WA_DeleteOnClose);
     splash->show();
     connect(this, SIGNAL(splashFinished(QWidget*)), splash, SLOT(slotFinish(QWidget*)));
+    connect(this, SIGNAL(requestedShutdown()), splash, SLOT(close()));
 }
 
 void BitcoinApplication::startThread()

src/wallet/wallet.h

@@ -398,6 +398,7 @@ public:
     {
         fCreditCached = false;
         fAvailableCreditCached = false;
+        fImmatureCreditCached = false;
         fAnonymizedCreditCached = false;
         fDenomUnconfCreditCached = false;
         fDenomConfCreditCached = false;