Core/Misc: Fix nopch build

Author: Shauren

src/server/game/Server/Packets/CharacterPackets.h

@@ -19,7 +19,9 @@
 #define CharacterPackets_h__
 
 #include "Packet.h"
+#include "ObjectGuid.h"
 #include "Position.h"
+#include "SharedDefines.h"
 
 namespace WorldPackets
 {