[Ada] Missing error for invalid atomic component

[Eric Botcazou]

The compiler should issue the "atomic access cannot be guaranteed" error twice 
on the attached testcase, but it only issues it for the stand-alone variable.

Fixed thusly, tested on i586-suse-linux, applied on the mainline.


2011-10-26  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/decl.c (gnat_to_gnu_field): Always check components
	declared as atomic.  Move around conditionally executed code.


2011-10-26  Eric Botcazou  <ebotcazou@adacore.com>

	* gnat.dg/specs/atomic1.ads: New test.


-- 
Eric Botcazou
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