[Ada] Small tweak to renaming code

[Eric Botcazou]

The code was testing Is_Composite_Type on the naked Etype, which doesn't 
really work if the type is private.

Tested on i586-suse-linux, applied on the mainline.


2009-04-07  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Test the
	underlying type.
	* gcc-interface/trans.c (lvalue_required_p): Likewise.


-- 
Eric Botcazou
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