(CHISE_Attribute_Table): Define as a structure.

(CHISE_Attribute_Table): Define as a structure.
(chise_open_decoding_table): Use `CHISE_Decoding_Table *' instead of
`CHISE_Decoding_Table **' as the type of the first argument.
(chise_open_feature_table): Use `CHISE_Feature_Table *' instead of
`CHISE_Feature_Table **' as the type of the first argument.
(chise_open_attribute_table): Use `CHISE_Attribute_Table *' instead of
`CHISE_Attribute_Table **' as the type of the first argument.