Core/Vehicles: Remove Vehicle.h dependency from other header files

src/server/game/Spells/Auras/SpellAuraEffects.cpp

@@ -35,6 +35,7 @@
 #include "GridNotifiersImpl.h"
 #include "CellImpl.h"
 #include "ScriptMgr.h"
+#include "Vehicle.h"
 
 class Aura;
 //

src/server/game/Spells/Auras/SpellAuras.cpp

@@ -34,6 +34,7 @@
 #include "CellImpl.h"
 #include "ScriptMgr.h"
 #include "SpellScript.h"
+#include "Vehicle.h"
 
 AuraApplication::AuraApplication(Unit* target, Unit* caster, Aura * aura, uint8 effMask):
 m_target(target), m_base(aura), m_slot(MAX_AURAS), m_flags(AFLAG_NONE),