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*sSpellStore.LookupEntry is no longer valid, use sSpellMgr-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/Karazhan/boss_midnight.cpp

@@ -98,7 +98,7 @@ public:
 
         void UpdateAI(const uint32 diff);
 
-        void SpellHit(Unit* /*source*/, const SpellEntry *spell)
+        void SpellHit(Unit* /*source*/, const SpellInfo *spell)
         {
             if (spell->Mechanic == MECHANIC_DISARM)
                 DoScriptText(SAY_DISARMED, me);

src/server/scripts/EasternKingdoms/Karazhan/boss_prince_malchezaar.cpp

@@ -149,7 +149,7 @@ public:
                 CAST_CRE(pMalchezaar)->AI()->KilledUnit(who);
         }
 
-        void SpellHit(Unit* /*who*/, const SpellEntry *spell)
+        void SpellHit(Unit* /*who*/, const SpellInfo *spell)
         {
             if (spell->Id == SPELL_INFERNAL_RELAY)
             {
@@ -305,7 +305,7 @@ public:
 
         void EnfeebleHealthEffect()
         {
-            const SpellEntry *info = GetSpellStore()->LookupEntry(SPELL_ENFEEBLE_EFFECT);
+            const SpellInfo *info = sSpellMgr->GetSpellInfo(SPELL_ENFEEBLE_EFFECT);
             if (!info)
                 return;
 

src/server/scripts/EasternKingdoms/Karazhan/boss_shade_of_aran.cpp

@@ -486,12 +486,12 @@ public:
                 DrinkInturrupted = true;
         }
 
-        void SpellHit(Unit* /*pAttacker*/, const SpellEntry* Spell)
+        void SpellHit(Unit* /*pAttacker*/, const SpellInfo* Spell)
         {
             //We only care about interrupt effects and only if they are durring a spell currently being casted
-            if ((Spell->Effect[0] != SPELL_EFFECT_INTERRUPT_CAST &&
-                Spell->Effect[1] != SPELL_EFFECT_INTERRUPT_CAST &&
-                Spell->Effect[2] != SPELL_EFFECT_INTERRUPT_CAST) || !me->IsNonMeleeSpellCasted(false))
+            if ((Spell->Effects[0].Effect != SPELL_EFFECT_INTERRUPT_CAST &&
+                Spell->Effects[1].Effect != SPELL_EFFECT_INTERRUPT_CAST &&
+                Spell->Effects[2].Effect != SPELL_EFFECT_INTERRUPT_CAST) || !me->IsNonMeleeSpellCasted(false))
                 return;
 
             //Interrupt effect

src/server/scripts/EasternKingdoms/Karazhan/bosses_opera.cpp

@@ -340,7 +340,7 @@ public:
             me->DespawnOrUnsummon();
         }
 
-        void SpellHit(Unit* /*caster*/, const SpellEntry *Spell)
+        void SpellHit(Unit* /*caster*/, const SpellInfo *Spell)
         {
             if ((Spell->SchoolMask == SPELL_SCHOOL_MASK_FIRE) && (!(rand()%10)))
             {
@@ -1080,7 +1080,7 @@ public:
             me->DespawnOrUnsummon();
         }
 
-        void SpellHit(Unit* /*caster*/, const SpellEntry *Spell)
+        void SpellHit(Unit* /*caster*/, const SpellInfo *Spell)
         {
             if (Spell->Id == SPELL_DRINK_POISON)
             {