remove unnecessary NULL checks

Reviewed-by: Rich Salz <rsalz@openssl.org>
diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c
index dd93e25..bde19e1 100644
--- a/ssl/s3_enc.c
+++ b/ssl/s3_enc.c
@@ -477,8 +477,7 @@
 void ssl3_init_finished_mac(SSL *s)
 {
     BIO_free(s->s3->handshake_buffer);
-    if (s->s3->handshake_dgst)
-        ssl3_free_digest_list(s);
+    ssl3_free_digest_list(s);
     s->s3->handshake_buffer = BIO_new(BIO_s_mem());
     (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE);
 }