修复未配置GameEntiry中的ecConfig时报错的问题

src/cocos/CocosEntry.ts

@@ -48,7 +48,7 @@ export abstract class CocosEntry extends Component {
         director.addPersistRootNode(this.node);
         this.node.setSiblingIndex(this.node.children.length - 1);
         PropsHelper.setConfig(this.uiConfig?.json);
-        ECManager.registerEntityConfig(this.ecConfig?.json);
+        this.ecConfig && ECManager.registerEntityConfig(this.ecConfig.json);
         this.initPlatform();
         this.initEvent();
         this.initTime();

src/ecmodule/ECManager.ts

@@ -86,6 +86,9 @@ export class ECManager {
      * @param config 实体配置信息，格式为 {实体名: {组件名: 组件数据}}
      */
     public static registerEntityConfig(config: { [entityName: string]: IEntityConfig }): void {
+        if (!config) {
+            return;
+        }
         // 遍历并注册每个实体的配置
         for (const entityName in config) {
             this._entityList[entityName] = config[entityName];