cpplib: Fix C++ named operators bug

[Jason Merrill]

>>>>> "Neil" == Neil Booth <neil@daikokuya.demon.co.uk> writes:

> Jason Merrill wrote:-
>> > This isn't a regression, 3.0 and 3.1 have the bug so I'll just
>> > put this in 3.2.
>> 
>> Does 2.95 have the bug?

> 2.95 doesn't have named operators as far as I'm aware.

It does.  However, they were handled in the frontend, so your testcase
wouldn't have worked.

Jason