Cancel button wrong warning fix

source/ubinstall-gtk-page-switch.c

@@ -430,6 +430,7 @@ void on_page_cancel_clicked(GtkWidget *, main_window *widgets){
     gtk_widget_set_sensitive(widgets->ConfigurationModeMenuItem,1);
         yon_page_update(widgets);
 
+    if (main_config.install_thread){
         dialog_confirmation_data *data = yon_confirmation_dialog_data_new();
         data->action_text=INTERRUPT_TEXT_LABEL;
         data->title=WARNING_TITLE_LABEL;
@@ -440,6 +441,7 @@ void on_page_cancel_clicked(GtkWidget *, main_window *widgets){
                 pthread_cancel((pthread_t)main_config.install_thread);
             }
         }
+    }
 }
 
 void on_system_setup_pass(GtkWidget *, main_window *widgets){