make ToLocalCheck crash in release mode

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 8b2f39d1235ab534b5d884185a7561110eeaf62a..c4536d6a7c10f9ed1816ec6850945dee2968bb9f 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -439,7 +439,7 @@ class MaybeLocal {
     return !IsEmpty();
   }
 
-  // Will crash when checks are enabled if the MaybeLocal<> is empty.
+  // Will crash if the MaybeLocal<> is empty.
   V8_INLINE Local<T> ToLocalChecked();
 
   template <class S>
@@ -6909,9 +6909,7 @@ Local<T> Eternal<T>::Get(Isolate* isolate) {
 
 template <class T>
 Local<T> MaybeLocal<T>::ToLocalChecked() {
-#ifdef V8_ENABLE_CHECKS
-  if (val_ == nullptr) V8::ToLocalEmpty();
-#endif
+  if (V8_UNLIKELY(val_ == nullptr)) V8::ToLocalEmpty();
   return Local<T>(val_);
 }