bool var_is_value_missing (const struct variable *, const union value *,
enum mv_class);
bool var_is_num_missing (const struct variable *, double, enum mv_class);
-bool var_is_str_missing (const struct variable *, const char[], enum mv_class);
+bool var_is_str_missing (const struct variable *, const uint8_t[], enum mv_class);
/* Value labels. */
const char *var_lookup_value_label (const struct variable *,