Fixed warning and unnecessary double-not operator

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Автор: namreeb


<pre style='white-space:pre-wrap;width:81ex'>Fixed warning and unnecessary double-not operator</pre>


Подробнее... (https://github.com/cmangos/mangos-wotlk/commit/e3ba2bf8d6f8700508f3e54b610c94d620ae7e2e)