if (win_to_task_table) g_hash_table_foreach(win_to_task_table, taskbar_remove_task, 0);
for (i=0 ; i < nb_panel ; i++) {
panel = &panel1[i];
if (win_to_task_table) g_hash_table_foreach(win_to_task_table, taskbar_remove_task, 0);
for (i=0 ; i < nb_panel ; i++) {
panel = &panel1[i];