Document assumptions that are being made to avoid NULL pointer dereferences

src/qt/walletframe.cpp

@@ -7,6 +7,7 @@
 #include "bitcoingui.h"
 #include "walletview.h"
 
+#include <cassert>
 #include <cstdio>
 
 #include <QHBoxLayout>
@@ -69,6 +70,7 @@ bool WalletFrame::setCurrentWallet(const QString& name)
 
     WalletView *walletView = mapWalletViews.value(name);
     walletStack->setCurrentWidget(walletView);
+    assert(walletView);
     walletView->updateEncryptionStatus();
     return true;
 }