[C++ PATCH]: Fix 9109

[Nathan Sidwell]

Mark,
this fixes bug 9109 that I stumbled over. If 'int (T)' is parseable
as both a declaration 'T of type int' or an abstract declaration
'function returning int taking parameter T' (T being a template type parm),
we must prefer the abstract declarator.

It also fixes
	void (foo) (int i = 0);
which I believe is well formed.

Rather than have to call cp_parser_declarator twice, once for each kind
of declaration, I made its abstract_p argument tri-valued.

built and tested on i686-pc-linux-gnu, ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
          The voices in my head said this was stupid too
nathan@codesourcery.com : http://www.cs.bris.ac.uk/~nathan/ : nathan@acm.org

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