Why double autoWB.apply() despite no differences in the result?

[shlee625]

Hi, yuanxy92.
Thanks for your great implementation!
During my work, I have a question about Cpp implementation codes.
In Cpp/main.cpp Line 32 and 33, you did autoWB.apply() twice.
I commented one of them and found there was no difference in their results.
Do you have any reason to do so?

By the way, I think this function has typo: autoWB.apply() has to be autoWB.calc().
Thanks.