* decl.c (start_function): Make member functions one_only on windows.
	* decl2.c (import_export_decl): Likewise.
	* decl.c (grokdeclarator): Don't complain about implicit int in
	a system header.  Change same-name field check to not complain in
	a system header instead of within extern "C".

From-SVN: r24839