[Patch, libfortran, committed] Cleanup NEWUNIT allocation

[Janne Blomqvist]

Hi,

attached patch committed to trunk as obvious after regtesting.

2011-11-01  Janne Blomqvist  <jb@gcc.gnu.org>

	* io/io.h (next_available_newunit): Remove prototype.
	* io/unit.h (next_available_newunit): Make variable static,
	initialize it.
	(init_units): Don't initialize next_available_newunit.
	(get_unique_unit_number): Use atomic builtin if available.


-- 
Janne Blomqvist
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