volume-raise-10 is broken

[Ambrevar]

n is undefined in the function definition.
The following fixes it:

(defun volume-raise-10 (&optional n)
  "Raise the volume by 10 N percentage units."
  (interactive "p")
  (volume-raise (* (or n 1) 10)))

Are you still maintaining this or should I fork it?

[dbrock]

You can certainly fork it if you want, but I would also appreciate a pull request!