fixing the loader

Viewer/src/model/modelLoader.ts

@@ -31,7 +31,7 @@ export class ModelLoader {
      */
     public load(modelConfiguration: IModelConfiguration): ViewerModel {
 
-        const model = new ViewerModel(this._viewer.scene, modelConfiguration);
+        const model = new ViewerModel(this._viewer, modelConfiguration);
 
         if (!modelConfiguration.url) {
             model.state = ModelState.ERROR;

dist/preview release/viewer/babylon.viewer.d.ts

@@ -447,7 +447,7 @@ declare module BabylonViewer {
     }
 
     export class ViewerModel {
-        constructor(scene: BABYLON.Scene, modelConfiguration: IModelConfiguration);
+        constructor(viewer: AbstractViewer, modelConfiguration: IModelConfiguration);
         loader: BABYLON.ISceneLoaderPlugin | BABYLON.ISceneLoaderPluginAsync;
         meshes: Array<BABYLON.AbstractMesh>;
         rootMesh: BABYLON.AbstractMesh;