[9324] Fix some gcc warnings

[newsbot]

<pre>m src/game/AccountMgr.cpp
m src/game/AccountMgr.h
m src/game/Chat.cpp
m src/game/GossipDef.cpp
m src/game/GridNotifiers.h
m src/game/Group.cpp
m src/game/Level0.cpp
m src/game/Level2.cpp
m src/game/Level3.cpp
m src/game/LootHandler.cpp
m src/game/Map.cpp
m src/game/MiscHandler.cpp
m src/game/NPCHandler.cpp
m src/game/ObjectAccessor.cpp
m src/game/Pet.cpp
m src/game/PetitionsHandler.cpp
m src/game/Player.cpp
m src/game/PlayerDump.cpp
m src/game/QueryHandler.cpp
m src/game/Spell.cpp
m src/game/SpellAuras.cpp
m src/game/SpellAuras.h
m src/game/SpellEffects.cpp
m src/game/Unit.cpp
m src/game/World.cpp
m src/shared/Database/DatabasePostgre.cpp
m src/shared/revision_nr.h

[9324] Fix some gcc warnings</pre>



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