found bug in QSanInvokeSkillDock::update()

[hejun442001]

I found bug in QSanInvokeSkillDock::update()

at src/ui/qsanbutton.cpp L390 : " int btnWidth = _m_width / btnNum[i] "
program crashed when btnNum[i] equals zero.
it will happen when player lost all skills.

I fixed the bug in this commit:
https://github.com/hejun442001/QSanguosha/commit/686129feb5c0ca35dced20e9bf4b026c9c3a0bdc

(btw: I cannot send pull request to this project, so I send this issues)

[gaodayihao]

Thank you for your feedback.
We also found the problem, but I tend to use this way to solve:

at: src\ui\qsanbutton.h L144: update();
modified as: if (!_m_buttons.empty()) update();

[gaodayihao]

I think this solution is safer and easier to read.

Thanks for your feedback again.

[hejun442001]

最后决定在我的分支中用 @gaodayihao 的方案了
这里呢？

[gaodayihao]

都没用…………因为都有点笨…………: )

[hejun442001]

为什么？ 55555555555555555~~~~~~~~~~~~