Fix "array subscript is of type 'char'" on NetBSD 9

    In file included from rdata.c:602:
    In file included from ./code.h:88:
    ./rdata/in_1/svcb_64.c:259:9: warning: array subscript is of type 'char' [-Wchar-subscripts]
                            if (!isdigit(*region->base)) {
                                 ^~~~~~~~~~~~~~~~~~~~~~
    /usr/include/sys/ctype_inline.h:51:44: note: expanded from macro 'isdigit'
    #define isdigit(c)      ((int)((_ctype_tab_ + 1)[(c)] & _CTYPE_D))
                                                    ^~~~

diff --git a/lib/dns/rdata/in_1/svcb_64.c b/lib/dns/rdata/in_1/svcb_64.c
index 12e8caae52abfe559689ab2b11302ca7902c69a5..a9d65f98dad7e23e740ac9f850fb207582c5693f 100644 (file)
--- a/lib/dns/rdata/in_1/svcb_64.c
+++ b/lib/dns/rdata/in_1/svcb_64.c
@@ -256,7 +256,7 @@ svc_fromtext(isc_textregion_t *region, isc_buffer_t *target) {
                        RETERR(alpn_fromtxt(region, target));
                        break;
                case sbpr_port:
-                       if (!isdigit(*region->base)) {
+                       if (!isdigit((unsigned char)*region->base)) {
                                return (DNS_R_SYNTAX);
                        }
                        ul = strtoul(region->base, &e, 10);