pass through keepData argument when loadGltfFromBuffer is called

thermion_dart/lib/src/filament/src/implementation/ffi_filament_app.dart

@@ -936,7 +936,7 @@ class FFIFilamentApp extends FilamentApp<Pointer> {
           GltfResourceLoader_destroyRenderThread(
               engine, gltfResourceLoader, requestId, cb));
 
-      return FFIAsset(asset, this, animationManager.cast<TAnimationManager>());
+      return FFIAsset(asset, this, animationManager.cast<TAnimationManager>(), keepData:keepData);
     } finally {
       if (FILAMENT_WASM) {
         //stackRestore(stackPtr);