[gnome-disk-utility] gduformatdiskdialog: Fix parameter of g_signal_connect () and remove unused variable

[Kai Lüke <kailueke src gnome org>]

commit 1e42b8796e69d922382c91b5313cc8f86e871186
Author: Manuel Wassermann <manuel wassermann97 gmail com>
Date:   Wed Mar 30 14:06:31 2022 +0200

    gduformatdiskdialog: Fix parameter of g_signal_connect () and remove unused variable

 src/disks/gduformatdiskdialog.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/src/disks/gduformatdiskdialog.c b/src/disks/gduformatdiskdialog.c
index 44a0280a..2a031172 100644
--- a/src/disks/gduformatdiskdialog.c
+++ b/src/disks/gduformatdiskdialog.c
@@ -436,7 +436,6 @@ gdu_format_disk_dialog_show (GduWindow    *window,
                              UDisksObject *object)
 {
   FormatDiskData *data;
-  gint response;
 
   data = g_new0 (FormatDiskData, 1);
   data->window = g_object_ref (window);
@@ -470,6 +469,6 @@ gdu_format_disk_dialog_show (GduWindow    *window,
   gtk_widget_show_all (data->dialog);
   gtk_widget_grab_focus (data->type_combobox);
 
-  g_signal_connect (data->dialog, "response", dialog_response_cb, data);
+  g_signal_connect (data->dialog, "response", G_CALLBACK (dialog_response_cb), data);
   gtk_window_present (GTK_WINDOW (data->dialog));
 }