Update Source/Scene/Cesium3DTileset.js
Update Source/Scene/Cesium3DTileset.js

Co-authored-by: Peter Gagliardi <53393f6d7d85735a97f2aa617f4bdbb43cbacc95@gmail.com>
CesiumGS/cesium,likangning93/cesium,CesiumGS/cesium,likangning93/cesium,CesiumGS/cesium,CesiumGS/cesium,CesiumGS/cesium,AnalyticalGraphicsInc/cesium,likangning93/cesium,likangning93/cesium,AnalyticalGraphicsInc/cesium,likangning93/cesium