machine attribute patch

[Jeffrey A Law]

  In message < 199808241946.MAA16571@yorick.cygnus.com >you write:
  > A prefix attribute in a decl should only apply to the decl.
  > 
  > 1998-08-24  Jason Merrill  <jason@yorick.cygnus.com>
  > 
  > 	* tree.c (valid_machine_attribute): Don't apply attributes to both
  > 	decl and type.
Looks good to me.
jeff