Fixes windows build.

src/ScriptResolving/AngelScript/TypeRegistry/NativeArray.hpp

@@ -7,7 +7,7 @@
 template <typename T> class NativeArray {
 private:
     const T* _array;
-    std::atomic<ulong> _refCount;
+    std::atomic<u64> _refCount;
 
     void AddRef() {
         _refCount++;