crypto: remove unnecessary variables of alpn/npn

The Local variables of `npn_buffer` and `alpn_buffer` are not necessary to be created from `args[0]`. Remove and fold them into the subsequent call. PR-URL: #10831 Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Myles Borins <[email protected]>

Author: shigeki

src/node_crypto.cc

@@ -2073,8 +2073,8 @@ void SSLWrap<Base>::SetNPNProtocols(const FunctionCallbackInfo<Value>& args){
 if (args.Length() < 1 || !Buffer::HasInstance(args[0]))
 return env->ThrowTypeError("Must give a Buffer as first argument");
 
-Local<Value> npn_buffer =  Local<Value>::New(env->isolate(), args[0]);
-bool r = w->object()->SetHiddenValue(env->npn_buffer_string(), npn_buffer);
+bool r = w->object()->SetHiddenValue(env->npn_buffer_string(), args[0]);
+
 CHECK(r);
 }
 #endif// OPENSSL_NPN_NEGOTIATED
@@ -2156,9 +2156,8 @@ void SSLWrap<Base>::SetALPNProtocols(
 int r = SSL_set_alpn_protos(w->ssl_, alpn_protos, alpn_protos_len);
 CHECK_EQ(r, 0);
  } else{
- Local<Value> alpn_buffer = Local<Value>::New(env->isolate(), args[0]);
-bool ret = w->object()->SetHiddenValue(env->alpn_buffer_string(),
- alpn_buffer);
+bool ret = w->object()->SetHiddenValue(env->alpn_buffer_string(), args[0]);
+
 CHECK(ret);
 // Server should select ALPN protocol from list of advertised by client
 SSL_CTX_set_alpn_select_cb(w->ssl_->ctx, SelectALPNCallback, nullptr);