Fixed unsensitiveness of buttons at completion page

source/ubinstall-gtk.c

@@ -819,9 +819,11 @@ void on_page_navigation_clicked(GtkWidget *self, main_window *widgets){
                         yon_debug_output("Install state: %s\n",yon_char_from_int(main_config.install_complete));
                     if (main_config.install_complete)
                         gtk_notebook_set_current_page(GTK_NOTEBOOK(widgets->Notebook),YON_PAGE_COMPLETION);
-                    gtk_widget_set_sensitive(widgets->CancelInstallButton,0);
-                    gtk_widget_set_sensitive(widgets->NextButton,0);
-                    gtk_widget_set_sensitive(widgets->BackButton,0);
+                    else {
+                        gtk_widget_set_sensitive(widgets->CancelInstallButton,0);
+                        gtk_widget_set_sensitive(widgets->NextButton,0);
+                        gtk_widget_set_sensitive(widgets->BackButton,0);
+                    }
                 }break;
                 case YON_PAGE_INSTALLATION_BEGIN:{
                     pthread_t tid;