update crmeb/app/services/activity/lottery/LuckPrizeServices.php.

抽奖随机bug，当随机数=$totalChance时，无法取到随机，应减1。
0到$totalChance-1
这样才能跟“if ($prizeChance >= $startChance && $prizeChance < $newStartChance) {” 这行的$prizeChance < $newStartChance 匹配为true

crmeb/app/services/activity/lottery/LuckPrizeServices.php

@@ -173,7 +173,7 @@ class LuckPrizeServices extends BaseServices
         if (!$totalChance) return $prize;
         $startChance = 0;
         mt_srand();
-        $prizeChance = rand(0, $totalChance);
+        $prizeChance = rand(0, $totalChance-1);
         $newPrize = array_combine(array_column($data, 'type'), $data);
         foreach ($data as $item) {
             $newStartChance = $item['chance'] + $startChance;