fix: when uid==1 then crash

[minami9]

修复用户uid等于1时，会crash问题

[dataabc]

感谢贡献代码，个人认为这里print改成logger.warning更好一点，因为方便写日志。如果有不同看法，欢迎讨论。

[minami9]

@dataabc
emm..I think the function named string_to_int is not good.
Because of there is no flag to notify caller that inputted string is right or not.
Maybe need like this(ref to libc):

import string 
string.atoi(covert_string)

I don't know why not use the function we had, but according to Qt, there have a *ok to notify that convert progress have not error occurred.

int QString::toInt(const QString &covert_string, bool *ok)

and, the logger.warning is better than current solution, I will modify it and push again later.)

[dataabc]

string_to_int是将字符串转化数字的，微博评论点赞等的数量有时会包含'万'等，需要转化成数字。您的意思是要在这个方法内添加个是否成功的返回值，还是添加个参数告诉本方法?我不了解qt，搜索了一下，发现是可视化工具，qt的规范是要这样吗？期待您的解答，感谢。

[dataabc]

感谢贡献代码，已merge。