(ideographic-radicals): Use `=ucs' instead of `ucs'.

(ideographic-radicals): Use `=ucs' instead of `ucs'.
(char-db-make-char-spec): Likewise; use `encode-char' instead of
`get-char-attribute' for it.
(char-db-insert-char-reference): Use `=ucs' instead of `ucs'.
(char-db-decode-isolated-char): Likewise.
(insert-char-attributes): Likewise.
(insert-char-data-with-variant): Likewise.
(insert-char-range-data): Likewise; use `encode-char' instead of
`get-char-attribute' for it.