fixes AppVeyor build problem by following the comment https://github.com/nyanp/tiny-cnn/pull/167#discussion_r65826649 indentation adjustments
fixes AppVeyor build problem by following the comment https://github.com/nyanp/tiny-cnn/pull/167#discussion_r65826649
indentation adjustments

Wangyida/tiny-cnn,zhangqianhui/tiny-cnn,H4kor/tiny-cnn,zhangqianhui/tiny-cnn,Wangyida/tiny-cnn,H4kor/tiny-cnn