src: add nullptr handling for NativeKeyObject

Fixes: https://github.com/nodejs/node/issues/56899
PR-URL: https://github.com/nodejs/node/pull/56900
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>

src/crypto/crypto_keys.cc

@@ -1066,6 +1066,7 @@ void NativeKeyObject::New(const FunctionCallbackInfo<Value>& args) {
   CHECK_EQ(args.Length(), 1);
   CHECK(args[0]->IsObject());
   KeyObjectHandle* handle = Unwrap<KeyObjectHandle>(args[0].As<Object>());
+  CHECK_NOT_NULL(handle);
   new NativeKeyObject(env, args.This(), handle->Data());
 }