src: remove duplicate HMAC_Init calls

PR-URL: #7374 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michael Dawson <[email protected]>

Author: bnoordhuis

src/node_crypto.cc

@@ -3326,13 +3326,10 @@ void Hmac::HmacInit(const char* hash_type, const char* key, int key_len){
 returnenv()->ThrowError("Unknown message digest");
  }
 HMAC_CTX_init(&ctx_);
-int result = 0;
 if (key_len == 0){
- result = HMAC_Init(&ctx_, "", 0, md);
- } else{
- result = HMAC_Init(&ctx_, key, key_len, md);
+ key = "";
  }
-if (!result){
+if (!HMAC_Init(&ctx_, key, key_len, md)){
 returnThrowCryptoError(env(), ERR_get_error());
  }
  initialised_ = true;