https-connect, fix httpsrr target check

The HTTPSRR check on the record's target was not working as it used the
wrong index on the NUL byte if the target was not NULL.

Fixes #16966
Reported-by: Pavel Kropachev
Closes #16968

diff --git a/lib/cf-https-connect.c b/lib/cf-https-connect.c
index 7b14a01abe0f78a9f6038b60507fe33031455bcc..9b80d9003c73029bb94f97a3db5312472f25adc5 100644 (file)
--- a/lib/cf-https-connect.c
+++ b/lib/cf-https-connect.c
@@ -673,7 +673,7 @@ CURLcode Curl_cf_https_setup(struct Curl_easy *data,
        (!conn->dns_entry->hinfo->target ||      /* for same host */
         !conn->dns_entry->hinfo->target[0] ||
         (conn->dns_entry->hinfo->target[0] == '.' &&
-         !conn->dns_entry->hinfo->target[0])) &&
+         !conn->dns_entry->hinfo->target[1])) &&
        (conn->dns_entry->hinfo->port < 0 ||    /* for same port */
         conn->dns_entry->hinfo->port == conn->remote_port)) {
       size_t i;