Crash fix

source/ubl-settings-usergroups-system.c

@@ -64,7 +64,7 @@ void yon_remove_confirmation_window_accept_clicked(GtkWidget *self,dictionary *d
             char *target;
             if (gtk_tree_selection_get_selected(gtk_tree_view_get_selection(GTK_TREE_VIEW(widgets->SystemTree)),&model,&iter)){
 				yon_tree_model_sort_filter_get_model_iter(GTK_TREE_MODEL_SORT(model),&iter,&child);
-                gtk_tree_model_get(model,&child,2,&target,-1);
+                gtk_tree_model_get(GTK_TREE_MODEL(widgets->liststore1),&child,2,&target,-1);
             }
             for_iter(GTK_TREE_MODEL(widgets->UsersList),&itar){
                 char *cur;