OpenRA/OpenRA — pull request #6175 by Phrohdoh (2014-08-05 00:11:27+00:00)
Title: AutoTarget ignores Building actors.

Closes #6170 and addresses:
```
[23:22:22]	units should only auto-target units
[23:22:27]	why?
[23:22:35]	that is how the original games worked
```

If there is a better way to check caller type let me know and I'll implement it.