刀剑笑无法读档了，一读档就退出，debug如下

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刀剑笑无法读档了，一读档就退出，debug如下

18:06:49 JY_Main start.

18:06:53 temp.lua:10111: attempt to concatenate field '?' (a nil value)

18:06:53 stack traceback:
        temp.lua:159: in function '__concat'
        temp.lua:10111: in function 'SaveList'
        temp.lua:574: in function 'StartMenu'
        temp.lua:205: in function <temp.lua:162>
        [C]: in function 'xpcall'
        temp.lua:154: in function <temp.lua:152>

18:06:53 ExitGame();

18:06:53 ExitSDL();

18:06:53 main() end;