2004-03-24  Dhruv Matani  <dhruvbird@gmx.net>

	* include/ext/bitmap_allocator.h: (_Bit_scan_forward) -> Made this
	function call __builtin_ctz instead of the while loop.
	(allocate) -> If condition has __builtin_expect.
	(deallocate) -> Ditto.
	Renamed a few left-over variables and typedefs according to the
	C++STYLE mentioned in the documentation.
	Protected calls to __gthread* by __gthread_active_p(), whose value
	is cached in the local variable __threads_active.

From-SVN: r79924