[12116] Improve error output for Pets without proper faction

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Автор: Schmoozerd


<pre>m doc/EventAI.txt
m src/game/Unit.cpp
m src/shared/revision_nr.h
</pre>
<pre style='white-space:pre-wrap;width:81ex'>[12116] Improve error output for Pets without proper faction

Also fix typo in EventAi doc, thanks to stfx for pointing</pre>


Подробнее... (https://github.com/cmangos/mangos-wotlk/commit/7553b555b77000b635811e5fa4371247244690a7)