[PATCH setup] Don't write garbage into the "extrakeys" user setting

[Jon Turney]

On 27/11/2017 21:35, Ken Brown wrote:
> The ExtraKeysSetting destructor called UserSettings::set() on a string
> that was terminated by LF instead of NUL.  This led to garbage at the

What...?!?

> /*
>  * It stores them all in a contiguous memory buffer.  Each is one line of
>  * ASCII text terminated by LF.  THERE IS NO NUL-TERMINATION HERE, TAKE CARE!
>  */

Awesome... :)

> end of the "extrakeys" setting that was written into setup.rc.  Fix
> this by replacing the final LF by NUL before calling set().

Thanks for tracking this down.  Please apply.