(char-attribute-name<) Use `charset-iso-final-char' instead of

(char-attribute-name<) Use `charset-iso-final-char' instead of
`charset-final'; fixed.
(insert-char-data): Delete unused local variable `name'; use
`charset-iso-graphic-plane' instead of `charset-graphic'.
(char-db-update-comment): Use `charset-iso-graphic-plane' instead of
`charset-graphic'.
(insert-char-range-data): Delete unused local variable `variants'.
(what-character-original-window-configuration): Define to avoid
compiler warning.