bug#835: 23.0.60; Quick calc is quietly disabled in view-mode

[Jay Belanger <jay.p.belanger@gmail.com>]

martin rudalics <rudalics@gmx.at> writes:
...
>> I suppose this means we have to find a separate fix for the original
>> bug...
>
> ... well, nothing hinders us assigning n, C-n and N to the same key.
> But I'd like to hear Jay's comments first.

The Calc manual mentions that all three act the same in
calc-dispatch-map, so they all should all be available.  That's just a
matter of adding one line to Martin's patch.
To make it less opaque, perhaps C-letter could be handled with something
like 
  (define-key map (vector (list 'control (car x))) (cdr x)))
(or something better) instead of
  (define-key map (char-to-string (- (car x) ?a -1)) (cdr x)))

Jay