Merge pull request #19 from lateminer/ui-respendalert

UI to alert of respend attempt affecting wallet.

src/wallet/wallet.cpp

@@ -1196,6 +1196,20 @@ bool CWallet::AddToWallet(const CWalletTx& wtxIn, bool fFromLoadWallet, CWalletD
         // Notify UI of new or updated transaction
         NotifyTransactionChanged(this, hash, fInsertedNew ? CT_NEW : CT_UPDATED);
 
+        // Notifications for existing transactions that now have conflicts with this one
+        if (fInsertedNew)
+        {
+            BOOST_FOREACH(const uint256& conflictHash, wtxIn.GetConflicts())
+            {
+                CWalletTx& txConflict = mapWallet[conflictHash];
+                NotifyTransactionChanged(this, conflictHash, CT_UPDATED); //Updates UI table
+                if (IsFromMe(txConflict) || IsMine(txConflict))
+                {
+                    NotifyTransactionChanged(this, conflictHash, CT_GOT_CONFLICT);  //Throws dialog
+                }
+            }
+        }
+    
         // notify an external script when a wallet transaction comes in or is updated
         std::string strCmd = GetArg("-walletnotify", "");