bug#24576: 25.1; desktop.el does not fully preserve registers with macros

[Dmitri Paduchikh]

Hello,

Register ?a contains keyboard macro. After loading desktop file:

(registerv-insert-func (get-register ?a))
=> "Unprintable entity"

(registerv-print-func (get-register ?a))
=> "Unprintable entity"

This makes M-x list-registers and register insertion to fail. Using
interpreted version of kmacro-to-register fixes this problem.

(registerv-insert-func (get-register ?b))
=> (lambda (k) (insert (format-kbd-macro k)))

(registerv-print-func (get-register ?b))
=> (lambda (k) (princ (format "a keyboard macro:
   %s" (format-kbd-macro k))))

In GNU Emacs 25.1.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.20.9)
 of 2016-09-18 built on juergen

Regards,
Dmitri Paduchikh