空数据处理

Modules/OpcData/Http/Controllers/Api/CarIllegalController.php

@@ -126,7 +126,7 @@ class CarIllegalController  extends BaseController
                     'place' => $val->point_name
                 ];
             }
-            return $data;
+            return $data ?? null;
         } catch (\Exception $e) {
             return $this->error(-1, '超速详细列表出错！');
         }