Fix error due to new chat type

[newsbot]

Автор: killerwife


<pre style='white-space:pre-wrap;width:81ex'>Fix error due to new chat type</pre>


Подробнее... (https://github.com/cmangos/mangos-wotlk/commit/959db8607ecf26ebbaff9898a26da0d9c1bbe598)