shoddy hack to get past a game crash

This is a workaround for two situations where the game will crash for similar reasons (in gehn's journal and at the nearby spinning dome). This is *definitely* not a fix (i.e., there's no reason to merge this if you can properly fix it instead), but at least this allows to continue with the game (with no huge memory leaks that I noticed..). Regards ![screen shot 2014-08-08 at 00 33 48](https://cloud.githubusercontent.com/assets/486707/3859642/e402c96c-1f1a-11e4-9da2-86c30cb180c3.png)