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*sSpellStore.LookupEntry is no longer valid, use sSpellMgr-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/game/Loot/LootMgr.cpp

@@ -23,6 +23,7 @@
 #include "Util.h"
 #include "SharedDefines.h"
 #include "SpellMgr.h"
+#include "SpellInfo.h"
 #include "Group.h"
 
 static Rates const qualityToRate[MAX_ITEM_QUALITY] = {
@@ -1743,14 +1744,14 @@ void LoadLootTemplates_Spell()
     uint32 count = LootTemplates_Spell.LoadAndCollectLootIds(ids_set);
 
     // remove real entries and check existence loot
-    for (uint32 spell_id = 1; spell_id < sSpellStore.GetNumRows(); ++spell_id)
+    for (uint32 spell_id = 1; spell_id < sSpellMgr->GetSpellInfoStoreSize(); ++spell_id)
     {
-        SpellEntry const* spellInfo = sSpellStore.LookupEntry (spell_id);
+        SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(spell_id);
         if (!spellInfo)
             continue;
 
         // possible cases
-        if (!IsLootCraftingSpell(spellInfo))
+        if (!spellInfo->IsLootCrafting())
             continue;
 
         if (ids_set.find(spell_id) == ids_set.end())