[gnome-commander/Implement_CppCheck_suggestions] Use static_cast instead of C-style cast

[Uwe Scholz <uwescholz src gnome org>]

commit 1d93f0586d2b95929e8005f63fbc24daca1aa3a1
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Tue Mar 12 22:28:17 2019 +0100

    Use static_cast instead of C-style cast

 src/dialogs/gnome-cmd-con-dialog.cc | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/dialogs/gnome-cmd-con-dialog.cc b/src/dialogs/gnome-cmd-con-dialog.cc
index 7555dec1..b9fecc8c 100644
--- a/src/dialogs/gnome-cmd-con-dialog.cc
+++ b/src/dialogs/gnome-cmd-con-dialog.cc
@@ -510,9 +510,9 @@ static void gnome_cmd_connect_dialog_init (GnomeCmdConnectDialog *dialog)
  */
 GnomeCmdConRemote *gnome_cmd_connect_dialog_new (gboolean has_alias)
 {
-    GnomeCmdConnectDialog *dialog = (GnomeCmdConnectDialog *) g_object_new (GNOME_CMD_TYPE_CONNECT_DIALOG, 
NULL);
+    auto *dialog = static_cast<GnomeCmdConnectDialog*> (g_object_new (GNOME_CMD_TYPE_CONNECT_DIALOG, 
nullptr));
 
-    g_return_val_if_fail (dialog != NULL, NULL);
+    g_return_val_if_fail (dialog != nullptr, nullptr);
 
     if (has_alias)
         dialog->priv->alias = new string;
@@ -525,11 +525,11 @@ GnomeCmdConRemote *gnome_cmd_connect_dialog_new (gboolean has_alias)
 
     gint response = gtk_dialog_run (*dialog);
 
-    GnomeCmdConRemote *server = NULL;
+    GnomeCmdConRemote *server = nullptr;
 
     if (response==GTK_RESPONSE_OK)
     {
-        const gchar *alias = dialog->priv->alias && !dialog->priv->alias->empty() ? 
dialog->priv->alias->c_str() : NULL;
+        const gchar *alias = dialog->priv->alias && !dialog->priv->alias->empty() ? 
dialog->priv->alias->c_str() : nullptr;
 
         server = gnome_cmd_con_remote_new (alias, dialog->priv->uri_str);