[Ada] Issue missing warning for 'Size attribute

[Eric Botcazou]

The documentation says that the compiler issues a warning for the 'Size 
attribute on discrete types if the specified value is larger than 64, but we 
failed to so for values between 65 and 128.

Tested on x86_64-suse-linux, applied on the mainline.


2015-05-25  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/utils.c (maybe_pad_type): Do not apply adjustment to
	original size for elementary types before issuing the size warning.


2015-05-25  Eric Botcazou  <ebotcazou@adacore.com>

	* gnat.dg/warn11.adb: New test.
	* gnat.dg/specs/alignment2.ads: Add dg-warning directive.


-- 
Eric Botcazou
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