fix: StaticEventHandler 버그 수정

hwe/sammo/Command/Nation/che_불가침수락.php

@@ -225,7 +225,7 @@ class che_불가침수락 extends Command\NationCommand
         $destLogger->pushGeneralActionLog("<D><b>{$nationName}</b></>{$josaWa} <C>$year</>년 <C>{$month}</>월까지 불가침에 성공했습니다.", ActionLogger::PLAIN);
         $destLogger->pushGeneralHistoryLog("<D><b>{$nationName}</b></>{$josaWa} {$year}년 {$month}월까지 불가침 성공");
 
-        StaticEventHandler::handleEvent($this->generalObj, $this->destGeneralObj, $this::class, $this->env, $this->arg);
+        StaticEventHandler::handleEvent($this->generalObj, $this->destGeneralObj, $this::class, $this->env, $this->arg ?? []);
         $general->applyDB($db);
         $destLogger->flush();