fix "send coins" via context menu in address book

- the send coins context menu entry was not working anymore, because
  a non current version of #2220 was merged onto current master
- also removes some unneeded spaces and adds a comment to
  WalletModel::getNumTransactions()

src/qt/walletview.h

@@ -49,9 +49,9 @@ public:
         functionality.
     */
     void setWalletModel(WalletModel *walletModel);
-    
+
     bool handleURI(const QString &uri);
-    
+
     void showOutOfSyncWarning(bool fShow);
 
 private:
@@ -105,7 +105,7 @@ public slots:
     /** Switch to receive coins page */
     void gotoReceiveCoinsPage();
     /** Switch to send coins page */
-    void gotoSendCoinsPage();
+    void gotoSendCoinsPage(QString addr = "");
 
     /** Show Sign/Verify Message dialog and switch to sign message tab */
     void gotoSignMessageTab(QString addr = "");
@@ -125,7 +125,7 @@ public slots:
     void changePassphrase();
     /** Ask for passphrase to unlock wallet temporarily */
     void unlockWallet();
-    
+
     void setEncryptionStatus();
 };