re PR libstdc++/45488 (lower_bound doesn't really require the iterator parameters to be default constructible)

2010-09-01  Christopher Yeleighton  <giecrilj@stegny.2a.pl>
	    Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/45488
	* include/bits/stl_algobase.h (lower_bound): Clean-up a tad, move
	two variables inside the main loop.
	* include/bits/stl_algo.h (lower_bound, upper_bound, equal_range):
	Likewise.

From-SVN: r163747