Core/Game: Include cleanup part 5

* ObjectMgr.h
* Player.h
* Unit.h
* G3D should no longer propagate everywhere from Spline/MotionMaster

src/server/game/Handlers/ToyHandler.cpp

@@ -22,6 +22,7 @@
 #include "ObjectMgr.h"
 #include "Player.h"
 #include "Spell.h"
+#include "SpellMgr.h"
 #include "ToyPackets.h"
 
 void WorldSession::HandleAddToy(WorldPackets::Toy::AddToy& packet)