size_t n;
/* For now, ignore SEPARATE and LAYERED. */
- lex_match_id ("SEPARATE") || lex_match_id ("LAYERED");
+ (void) ( lex_match_id ("SEPARATE") || lex_match_id ("LAYERED") );
lex_match (T_BY);
if (!parse_variables (default_dict, &v, &n, PV_NO_DUPLICATE))