- if (flag) {
- while ((s = _nc_expand_try(SP->_key_ok, c, &count, 0)) != 0
- && _nc_remove_key(&(SP->_key_ok), c)) {
- _nc_add_to_try(&(SP->_keytry), s, c);
- free(s);
- code = OK;
- count = 0;
- }
- } else {
- while ((s = _nc_expand_try(SP->_keytry, c, &count, 0)) != 0
- && _nc_remove_key(&(SP->_keytry), c)) {
- _nc_add_to_try(&(SP->_key_ok), s, c);
- free(s);
- code = OK;
- count = 0;
+ if (c >= 0) {
+ unsigned ch = (unsigned) c;
+ if (flag) {
+ while ((s = _nc_expand_try(SP->_key_ok, ch, &count, 0)) != 0
+ && _nc_remove_key(&(SP->_key_ok), ch)) {
+ code = _nc_add_to_try(&(SP->_keytry), s, ch);
+ free(s);
+ count = 0;
+ if (code != OK)
+ break;
+ }
+ } else {
+ while ((s = _nc_expand_try(SP->_keytry, ch, &count, 0)) != 0
+ && _nc_remove_key(&(SP->_keytry), ch)) {
+ code = _nc_add_to_try(&(SP->_key_ok), s, ch);
+ free(s);
+ count = 0;
+ if (code != OK)
+ break;
+ }