Add NDEBUG build

Change-Id: I81032fb43d6b4919bd264a644062dc31ae564427
diff --git a/src/dex_cache.h b/src/dex_cache.h
index 47f9bcf..5f3c54f 100644
--- a/src/dex_cache.h
+++ b/src/dex_cache.h
@@ -81,16 +81,16 @@
 
  private:
   ObjectArray<String>* GetStrings() const {
-      return down_cast<ObjectArray<String>*>(Get(kStrings));
+      return static_cast<ObjectArray<String>*>(Get(kStrings));
   }
   ObjectArray<Class>* GetClasses() const {
-      return down_cast<ObjectArray<Class>*>(Get(kClasses));
+      return static_cast<ObjectArray<Class>*>(Get(kClasses));
   }
   ObjectArray<Method>* GetMethods() const {
-      return down_cast<ObjectArray<Method>*>(Get(kMethods));
+      return static_cast<ObjectArray<Method>*>(Get(kMethods));
   }
   ObjectArray<Field>* GetFields() const {
-      return down_cast<ObjectArray<Field>*>(Get(kFields));
+      return static_cast<ObjectArray<Field>*>(Get(kFields));
   }
   DexCache();
 };