修改模块新闻加强版获取图片新闻

app/JsonRpc/NewsService.php

@@ -806,7 +806,7 @@ class NewsService implements NewsServiceInterface
             $category['img'] = WebsiteCategory::where($where)
                 ->leftJoin('article', 'article.catid', 'website_category.category_id')
                 ->where('article.status', 1)
-                ->whereNotNull('article.imgurl')
+                ->where('article.imgurl', '!=', '')
                 ->select('article.*','website_category.category_id','website_category.alias')
                 ->orderBy('article.updated_at', 'desc')
                 ->limit($data['img_num'])