sdegutis/hydra — pull request #162 by jhgg (2014-07-06 02:31:23+00:00)
Title: Fix geometry.rectmidpoint() mathematical error.

With a rect
```
{
h = 1058,
w = 1920,
x = 0,
y = 1080
}
```

You'd expect `geometry.rectmidpoint()` to return:
```
{
x = 960,
y = -551
}
```

However, it returned:
```
{
x = 960,
y = 1609
}
```

This fixes that issue.