add SendCoinsEntry::updateLabel() function

- makes the code for updating a label reusable
- no functional changes

src/qt/sendcoinsentry.cpp

@@ -60,12 +60,7 @@ void SendCoinsEntry::on_addressBookButton_clicked()
 
 void SendCoinsEntry::on_payTo_textChanged(const QString &address)
 {
-    if(!model)
+    updateLabel(address);
-        return;
-    // Fill in label from address book, if address has an associated label
-    QString associatedLabel = model->getAddressTableModel()->labelForAddress(address);
-    if(!associatedLabel.isEmpty())
-        ui->addAsLabel->setText(associatedLabel);
 }
 
 void SendCoinsEntry::setModel(WalletModel *model)
@@ -204,3 +199,19 @@ void SendCoinsEntry::updateDisplayUnit()
         ui->payAmount_s->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
     }
 }
+
+bool SendCoinsEntry::updateLabel(const QString &address)
+{
+    if(!model)
+        return false;
+
+    // Fill in label from address book, if address has an associated label
+    QString associatedLabel = model->getAddressTableModel()->labelForAddress(address);
+    if(!associatedLabel.isEmpty())
+    {
+        ui->addAsLabel->setText(associatedLabel);
+        return true;
+    }
+
+    return false;
+}

src/qt/sendcoinsentry.h

@@ -58,6 +58,8 @@ private:
     SendCoinsRecipient recipient;
     Ui::SendCoinsEntry *ui;
     WalletModel *model;
+
+    bool updateLabel(const QString &address);
 };
 
 #endif // SENDCOINSENTRY_H