(struct gl_state_s): New field `object'.
(SETUP_SYNTAX_TABLE_FOR_OBJECT): Set it.
Handle non-current buffer properly. Args renamed to all caps.
(SETUP_SYNTAX_TABLE): Set `object'. Args renamed to all caps.
(UPDATE_SYNTAX_TABLE): Use gl_state.object.
(UPDATE_SYNTAX_TABLE_FORWARD, UPDATE_SYNTAX_TABLE_BACKWARD): Likewise.
(SETUP_SYNTAX_TABLE_FOR_OBJECT): Add gl_state.offset
when using the arg FROM. Use BYTE_TO_CHAR.