Bitcoin-Qt: use reference in setAddress_SM() and setAddress_VM()

src/qt/signverifymessagedialog.cpp

@@ -55,13 +55,13 @@ void SignVerifyMessageDialog::setModel(WalletModel *model)
     this->model = model;
 }
 
-void SignVerifyMessageDialog::setAddress_SM(QString address)
+void SignVerifyMessageDialog::setAddress_SM(const QString &address)
 {
     ui->addressIn_SM->setText(address);
     ui->messageIn_SM->setFocus();
 }
 
-void SignVerifyMessageDialog::setAddress_VM(QString address)
+void SignVerifyMessageDialog::setAddress_VM(const QString &address)
 {
     ui->addressIn_VM->setText(address);
     ui->messageIn_VM->setFocus();

src/qt/signverifymessagedialog.h

@@ -20,8 +20,8 @@ public:
     ~SignVerifyMessageDialog();
 
     void setModel(WalletModel *model);
-    void setAddress_SM(QString address);
+    void setAddress_SM(const QString &address);
-    void setAddress_VM(QString address);
+    void setAddress_VM(const QString &address);
 
     void showTab_SM(bool fShow);
     void showTab_VM(bool fShow);