修复管理员权限问题

application/admin/controller/SingleSign.php

@@ -35,7 +35,7 @@ class SingleSign {
     //从session中读取信息
     public function getUserInfo(){
         $str = $this->getSid();
-        $pos = stripos($str,'is_admin|b:') + 11;
+        $pos = stripos($str,'isadmin|b:') + 10;
         $isAdmin = substr($str,$pos,1);
         $user['is_admin'] = $isAdmin;