Unsigned char cast for ctype in whois(1)

[Michael McConville]

ok?


Index: usr.bin/whois/whois.c
===================================================================
RCS file: /cvs/src/usr.bin/whois/whois.c,v
retrieving revision 1.50
diff -u -p -r1.50 whois.c
--- usr.bin/whois/whois.c       9 Oct 2015 01:37:09 -0000       1.50
+++ usr.bin/whois/whois.c       2 Nov 2015 17:05:06 -0000
@@ -302,7 +302,7 @@ choose_server(const char *name, const ch
                        return (MNICHOST);
                else
                        return (NICHOST);
-       } else if (isdigit(*(++qhead)))
+       } else if (isdigit((unsigned char)*(++qhead)))
                return (ANICHOST);
        len = strlen(qhead) + sizeof(QNICHOST_TAIL);
        if ((nserver = realloc(server, len)) == NULL)