void tab_subtable (struct tab_table *, int x1, int y1, int x2, int y2,
unsigned opt, struct table_item *subtable);
void tab_subtable_bare (struct tab_table *, int x1, int y1, int x2, int y2,
void tab_subtable (struct tab_table *, int x1, int y1, int x2, int y2,
unsigned opt, struct table_item *subtable);
void tab_subtable_bare (struct tab_table *, int x1, int y1, int x2, int y2,