bug#15447: (quail-help "korean-hangul") generates errors.

[Kenichi Handa]

In article 
<CAL0=0H3qh1xfncjnfH92TZm5UCXVCSBouyaVe1E=QciLLD-Z-Q@mail.gmail.com>, crocket 
<crockabiscuit@gmail.com> writes:

> The error trace is shown below.

> Debugger entered--Lisp error: (wrong-type-argument char-or-string-p nil)
>   quail-help("korean-hangul")

As these input methods are not "quail" input methods:
  korean-hangul, korean-hangul3f, korean-hangul390, korean-hangul3,
  ucs
quail-help doesn't work for them.

If you want to describe those input methods, do:
  (describe-input-method "korean-hangul")
or, type "C-h C-\ korean hangul RET".

---
Kenichi Handa
handa@gnu.org