Minor type fix

src/core/camera/PerspectiveCamera2.ts

@@ -430,7 +430,7 @@ export class PerspectiveCamera2 extends PerspectiveCamera implements ICamera {
     // region ui
 
     private _camUi: UiObjectConfig[] = [
-        ...generateUiConfig(this),
+        ...generateUiConfig(this) || [],
         {
             type: 'input',
             label: ()=>(this.autoNearFar ? 'Min' : '') + ' Near',

src/plugins/animation/CameraViewPlugin.ts

@@ -360,7 +360,7 @@ export class CameraViewPlugin extends AViewerPluginSync<'viewChange'|'startViewC
         // expanded: true,
         children: [
             ()=>[...this._cameraViews.map(view => view.uiConfig)],
-            ...generateUiConfig(this),
+            ...generateUiConfig(this) || [],
         ],
     }