订单支付成功后，分销佣金计算bug处理

biz-hd/distribution/classes/DistributionCommissionClass.php

@@ -671,9 +671,12 @@ class DistributionCommissionClass
 
     /**
      * 分销 finishTime：与 xhOrder.successTime 对齐，无则保留库中 finishTime
+     * @param object $order xhOrder
+     * @param array|null $existingRow 已有 xhDistributionOrder 行，首单计佣时为 null
      */
-    protected static function resolveDistributionFinishTime($order, array $existingRow)
+    protected static function resolveDistributionFinishTime($order, ?array $existingRow = null)
     {
+        $existingRow = $existingRow ?? [];
         $fromOrder = self::getSuccessTimeForDistribution($order);
         if ($fromOrder !== null) {
             return $fromOrder;