Bug: Crash with modifiers

[youle31]

test file: https://drive.google.com/file/d/0B3GouQIyoCmrLUM1ZmJNbVpNSkU/view?usp=sharing

steps: Press P -> crash

EDIT: Didn't happen in 0.1.7

[youle31]

First bad commit: 8e2a271

Backtrace: http://pasteall.org/pic/show.php?id=115810

[panzergame]

Fixed in 114230c.