Updated: [Patch] stl_tree.h: _Rb_tree_rebalance(): Add local variable for grandparent and use const

[Benjamin Kosnik]

>2003-07-05  Gawain Bolton  <gp.bolton@computer.org>
>
>	* include/bits/stl_tree.h: _Rb_tree_rebalance():  Add local
>          variable for grandparent and use const

In, thanks!

-benjamin