Don't index a void pointer, fixes compilation with visual studio.

Gcc/clang will treat void * as char * but this is non-standard.
OK deraadt@ jsing@ inoguchi@

1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libssl/tls13_lib.c b/src/lib/libssl/tls13_lib.c
index fb75419ac5..60fa372944 100644
--- a/src/lib/libssl/tls13_lib.c
+++ b/src/lib/libssl/tls13_lib.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: tls13_lib.c,v 1.9 2019/02/28 18:20:38 jsing Exp $ */
+/*      $OpenBSD: tls13_lib.c,v 1.10 2019/03/04 16:46:44 millert Exp $ */
 /*
  * Copyright (c) 2018, 2019 Joel Sing <jsing@openbsd.org>
  *
@@ -267,9 +267,10 @@ tls13_legacy_read_bytes(SSL *ssl, int type, unsigned char *buf, int len, int pee
 }
 
 int
-tls13_legacy_write_bytes(SSL *ssl, int type, const void *buf, int len)
+tls13_legacy_write_bytes(SSL *ssl, int type, const void *vbuf, int len)
 {
         struct tls13_ctx *ctx = ssl->internal->tls13;
+        const uint8_t *buf = vbuf;
         size_t n, sent;
         ssize_t ret;