Server state query works, client doesn't use the result yet

Both sides of this message uses QUERY_CHARACTER_EXISTS because I'm just
trying to push forward, without worrying about mistakes I might be making.
I just want to merge this back into the main branch so I can say that I've
actually done something over the last few months.

client/scenes/in_world.hpp

@@ -94,6 +94,7 @@ protected:
 	//character management
 	void HandleCharacterCreate(CharacterPacket* const);
 	void HandleCharacterDelete(CharacterPacket* const);
+	void HandleCharacterQueryExists(CharacterPacket* const);
 
 	//indexes
 	int& clientIndex;