[10692] Fixed some GCC warnings and code errors.

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<pre>m src/game/Chat.cpp
m src/game/Creature.cpp
m src/game/CreatureEventAI.cpp
m src/game/DBCEnums.h
m src/game/DBCStores.cpp
m src/game/GMTicketMgr.cpp
m src/game/GroupHandler.cpp
m src/game/Item.cpp
m src/game/Level2.cpp
m src/game/LootHandler.cpp
m src/game/Map.cpp
m src/game/MotionMaster.cpp
m src/game/ObjectMgr.cpp
m src/game/Pet.cpp
m src/game/PetAI.cpp
m src/game/Player.cpp
m src/game/QueryHandler.cpp
m src/game/QuestHandler.cpp
m src/game/Spell.cpp
m src/game/SpellAuras.cpp
m src/game/SpellEffects.cpp
m src/game/SpellMgr.cpp
m src/game/TradeHandler.cpp
m src/game/Unit.cpp
m src/game/UnitAuraProcHandler.cpp
m src/game/World.cpp
m src/game/WorldSession.cpp
m src/game/WorldSocket.cpp
m src/shared/Database/Database.cpp
m src/shared/Log.cpp
m src/shared/Log.h
m src/shared/Threading.cpp
m src/shared/revision_nr.h
</pre>
<pre style='white-space:pre-wrap;width:81ex'>[10692] Fixed some GCC warnings and code errors.

Thanks to freghar for provide cleaned list of warning messages.</pre>




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