Segfault in TeamChangedEvent on missing combobox

There is a combo box defined as:

```
CEGUI::Combobox *playerTeam;
```

Which is then assigned to a value only in a conditional. This conditional might not get hit. And then all the instances below where playerTeam is accessed will segfault.

There should be an else statement to the 'if' at the top of TeamChangedEvent() to handle this case.