CTMLoader loadParts worker issue fix (#8900)

loadParts is not passing incoming worker from parameters to load issue fixed

examples/js/loaders/ctm/CTMLoader.js

@@ -84,7 +84,7 @@ THREE.CTMLoader.prototype.loadParts = function( url, callback, parameters ) {
 				// load joined CTM file
 
 				var partUrl = basePath + jsonObject.data;
-				var parametersPart = { useWorker: parameters.useWorker, offsets: jsonObject.offsets };
+				var parametersPart = { useWorker: parameters.useWorker, worker:parameters.worker, offsets: jsonObject.offsets };
 				scope.load( partUrl, callbackFinal, parametersPart );
 
 			}