fix: 邮件

Gameserver/App/process/EmailProc.php

@@ -81,7 +81,7 @@ class EmailProc {
     public static function IsExistRedTip() {
 
         $tag = 0;
-        if (!isset(req())) {
+        if (null != req()) {
             CLog::err("req() 为空!");
             return $tag;
         }