re PR libstdc++/36338 (heap_sort effectively hangs with -D_GLIBCXX_DEBUG)

2008-05-31  Paolo Carlini  <paolo.carlini@oracle.com>
	    Chris Jefferson  <chris@bubblescope.net>

	PR libstdc++/36338
	* include/bits/stl_heap.h (sort_heap): Use __pop_heap directly.
	(pop_heap): Slightly tweak.

Co-Authored-By: Chris Jefferson <chris@bubblescope.net>

From-SVN: r136242