openssl: fix unused variable compiler warning with old openssl

URL: https://curl.haxx.se/mail/lib-2018-11/0055.html

Closes #3347

diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 404f9c8aa365980f7ca5f4a4501948df11968ea7..8bddb9a8c6a96db4779fe0b21f478e5ff2e28bf6 100644 (file)
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2167,6 +2167,7 @@ set_ssl_version_min_max(long *ctx_options, struct connectdata *conn,
     }
 #else
       (void)sockindex;
+      (void)ctx_options;
       failf(data, OSSL_PACKAGE " was built without TLS 1.3 support");
       return CURLE_NOT_BUILT_IN;
 #endif