[api] Make ObjectTemplate::SetNativeDataProperty() work even if the ObjectTemplate does not have a …

src/conversions.h

Index: src/conversions.h
diff --git a/src/conversions.h b/src/conversions.h
index 9b6d83b6bb0cd1271b6282029c3082828acda953..29262e53063ac5c6a74383dd12f5c19561b0c01a 100644
--- a/src/conversions.h
+++ b/src/conversions.h
@@ -172,7 +172,7 @@ inline bool IsUint32Double(double value);
 // Convert from Number object to C integer.
 inline int32_t NumberToInt32(Object* number);
 inline uint32_t NumberToUint32(Object* number);
-
+inline int64_t NumberToInt64(Object* number);
 
 double StringToDouble(UnicodeCache* unicode_cache, Handle<String> string,
                       int flags, double empty_string_val = 0.0);