a bug due to null value

[pzx521521]

i use it success but when i reopen "LeagueClientUx.exe", active_status display off(but it work). when i change the active_status , it report a bug like follow

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i find the reason:

in \HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\LeagueClientUx.exe if can create "LeagueClientUx.exe" but not "Debugger" because of UnauthorizedAccessException it will be use SymlinkMode success but if i reopen Pengu Loader.exe, active_status will show off, if i want not use Pengu Loader, i can't change it to off

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so I added a non-empty critique if dont add old != null, code will run here:

            catch
            {
                // if dont add `old != null`, code will run here and  caused a bug
                // TODO: handle some other errors
            }

[nomi-san]

Thank you, but you have forked the stable branch. I just changed to a separate fix branch and will merge it into dev later.