Bugfix: Supress "address" key in transaction details, when the destination isn't recognized

Previously, it would pass corrupt/random through base58.

src/rpcwallet.cpp

@@ -953,6 +953,13 @@ Value listreceivedbyaccount(const Array& params, bool fHelp)
     return ListReceived(params, true);
 }
 
+static void MaybePushAddress(Object & entry, const CTxDestination &dest)
+{
+    CBitcoinAddress addr;
+    if (addr.Set(dest))
+        entry.push_back(Pair("address", addr.ToString()));
+}
+
 void ListTransactions(const CWalletTx& wtx, const string& strAccount, int nMinDepth, bool fLong, Array& ret)
 {
     int64 nFee;
@@ -971,7 +978,7 @@ void ListTransactions(const CWalletTx& wtx, const string& strAccount, int nMinDe
         {
             Object entry;
             entry.push_back(Pair("account", strSentAccount));
-            entry.push_back(Pair("address", CBitcoinAddress(s.first).ToString()));
+            MaybePushAddress(entry, s.first);
             entry.push_back(Pair("category", "send"));
             entry.push_back(Pair("amount", ValueFromAmount(-s.second)));
             entry.push_back(Pair("fee", ValueFromAmount(-nFee)));
@@ -993,7 +1000,7 @@ void ListTransactions(const CWalletTx& wtx, const string& strAccount, int nMinDe
             {
                 Object entry;
                 entry.push_back(Pair("account", account));
-                entry.push_back(Pair("address", CBitcoinAddress(r.first).ToString()));
+                MaybePushAddress(entry, r.first);
                 if (wtx.IsCoinBase())
                 {
                     if (wtx.GetDepthInMainChain() < 1)