crypto: fix missing OPENSSL_NO_ENGINE guard

Author: codebytere

src/crypto/crypto_context.cc

@@ -34,7 +34,6 @@ using ncrypto::BIOPointer;
 using ncrypto::ClearErrorOnReturn;
 using ncrypto::CryptoErrorList;
 using ncrypto::DHPointer;
-using ncrypto::EnginePointer;
 using ncrypto::EVPKeyPointer;
 using ncrypto::MarkPopErrorOnReturn;
 using ncrypto::SSLPointer;
@@ -65,6 +64,10 @@ using v8::Signature;
 using v8::String;
 using v8::Value;
 
+#ifndef OPENSSL_NO_ENGINE
+using ncrypto::EnginePointer;
+#endif  // !OPENSSL_NO_ENGINE
+
 namespace crypto {
 static const char* const root_certs[] = {
 #include "node_root_certs.h"  // NOLINT(build/include_order)

src/crypto/crypto_util.cc

@@ -30,7 +30,6 @@ using ncrypto::BignumPointer;
 using ncrypto::BIOPointer;
 using ncrypto::CryptoErrorList;
 using ncrypto::DataPointer;
-using ncrypto::EnginePointer;
 using ncrypto::EVPKeyCtxPointer;
 using ncrypto::SSLCtxPointer;
 using ncrypto::SSLPointer;
@@ -56,6 +55,10 @@ using v8::Uint32;
 using v8::Uint8Array;
 using v8::Value;
 
+#ifndef OPENSSL_NO_ENGINE
+using ncrypto::EnginePointer;
+#endif  // !OPENSSL_NO_ENGINE
+
 namespace crypto {
 
 int PasswordCallback(char* buf, int size, int rwflag, void* u) {