Added two missing pets and fixed a tiny typo

I crashed while editing my save since I had a Bark Beetle and your program threw an IndexOutOfRange. I might make another patch to handle unidentified pets better unless you want to.

I might also run a comparison between the [the Pet wiki page](http://cubeworldwiki.net/index.php/Category:Pets) and the [Entity ID spreadsheet](https://docs.google.com/spreadsheet/lv?key=0As7kattQ9kwbdFp6ZTlzV0R1RVRaZklBbmZZb2lBZ2c&f=true&noheader=true&gid=5) and add all the missing pets.

I tested the code and it seems to be working fine and I was able to assign Bark Beetle.