Core: Use new SpellInfo class in core. Sadly, this commit is not compatibile with some of the custom code. To make your code work again you may need to change:

*SpellEntry is now SpellInfo
*GetSpellProto is now GetSpellInfo
*SpellEntry::Effect*[effIndex] is now avalible under SpellInfo.Effects[effIndex].*
*sSpellStore.LookupEntry is no longer valid, use sSpellMgr->GetSpellInfo()
*SpellFunctions from SpellMgr.h like DoSpellStuff(spellId) are now: spellInfo->DoStuff()
*SpellMgr::CalculateEffectValue and similar functions are now avalible in SpellEffectInfo class.
*GET_SPELL macro is removed, code which used it is moved to SpellMgr::LoadDbcDataCorrections
*code which affected dbc data in SpellMgr::LoadSpellCustomAttr is now moved to LoadDbcDataCorrections

src/server/scripts/EasternKingdoms/ScarletEnclave/chapter1.cpp

@@ -436,7 +436,7 @@ public:
             m_bIsDuelInProgress = false;
         }
 
-        void SpellHit(Unit* pCaster, const SpellEntry* pSpell)
+        void SpellHit(Unit* pCaster, const SpellInfo* pSpell)
         {
             if (!m_bIsDuelInProgress && pSpell->Id == SPELL_DUEL)
             {
@@ -625,7 +625,7 @@ public:
     {
         npc_salanar_the_horsemanAI(Creature* c) : ScriptedAI(c) {}
 
-        void SpellHit(Unit* caster, const SpellEntry *spell)
+        void SpellHit(Unit* caster, const SpellInfo *spell)
         {
             if (spell->Id == DELIVER_STOLEN_HORSE)
             {

src/server/scripts/EasternKingdoms/ScarletEnclave/chapter2.cpp

@@ -71,7 +71,7 @@ public:
             me->RestoreFaction();
         }
 
-        void SpellHit(Unit* caster, const SpellEntry *spell)
+        void SpellHit(Unit* caster, const SpellInfo *spell)
         {
             if (spell->Id == SPELL_PERSUASIVE_STRIKE && caster->GetTypeId() == TYPEID_PLAYER && me->isAlive() && !uiSpeech_counter)
             {