Itseez/opencv — pull request #2219 by ilya-lavrenov (2014-01-28 19:26:57+00:00)
Title: optimized createHanningWindow

```
Name of Test plain cool cool
vs
plain
(x-factor)
CreateHanningWindow::CreateHanningWindowFixture::640x480 30.205 ms 0.755 ms 39.99
CreateHanningWindow::CreateHanningWindowFixture::1920x1080 95.448 ms 4.180 ms 22.83
```