bug#20123: 24.4.91; Unwarranted "Unused lexical argument" for condition-case

[Oleh Krehel]

Hello,

Here's an example code:

    (define-error 'unsupported-mode-error "Unsupported mode")
    (condition-case e
        (if (eq 'a 'a)
            (message "test")
          (signal 'unsupported-mode-error major-mode))
      (unsupported-mode-error
       (signal (car e) (cdr e)))
      (error
       (message "error")))

As you can see, I'm trying to re-throw some of the errors, so the variable `e' 
is used
inside `condition-case'. But I still get an "Unused lexical argument" warning.

regards,
Oleh