regex: fix off-by-one error in regerror()

diff --git a/usual/regex.c b/usual/regex.c
index ee69fe638b7a7e518eda0300805a5430a4c5b8bd..fa51d2938e4e4948891d8881e1264d5ed390f6e3 100644 (file)
--- a/usual/regex.c
+++ b/usual/regex.c
@@ -1272,7 +1272,7 @@ size_t regerror(int err, const regex_t *rx, char *dst, size_t dstlen)
                "ESUBREG",      /* 13 */
        };
        const char *s = "EUNKNOWN";
-       if ((size_t)err <= ARRAY_NELEM(errlist))
+       if ((size_t)err < ARRAY_NELEM(errlist))
                s = errlist[err];
        return snprintf(dst, dstlen, "%s", s);
 }