Hi

    I just committed this trivial cleanup.

2015-11-09  François Dumont  <fdumont@gcc.gnu.org>

    * include/bits/stl_algo.h
    (partial_sort_copy): Instantiate std::iterator_traits only if concept
    checks.
    (lower_bound): Likewise.
    (upper_bound): Likewise.
    (equal_range): Likewise.
    (binary_search): Likewise.
    * include/bits/stl_heap.h (pop_heap): Likewise.

François