message: Fix variable shadowin in qt/askpassphrasedialog.cpp
  qt/askpassphrasedialog.cpp:85:49: warning: declaration shadows a field of 'AskPassphraseDialog' [-Wshadow]
  void AskPassphraseDialog::setModel(WalletModel *model) { this->model = model; }
  ^
  ./qt/askpassphrasedialog.h:43:18: note: previous declaration is here
  WalletModel *model;
  ^
diff: @@ -82,7 +82,7 @@ AskPassphraseDialog::~AskPassphraseDialog()
  delete ui;
  }
  -void AskPassphraseDialog::setModel(WalletModel *model) { this->model = model; }
  +void AskPassphraseDialog::setModel(WalletModel *_model) { this->model = _model; }
  void AskPassphraseDialog::accept()
  {
  SecureString oldpass, newpass1, newpass2;
  