[7227] Implement prismatic sockets. Related code cleanups.

Big thanks to TOM_RUS for help in reseach!
    Author: VladimirMangos

--HG--
branch : trunk

src/game/Spell.cpp

@@ -574,6 +574,7 @@ void Spell::FillTargetMap()
                     break;
                 /*case SPELL_EFFECT_ENCHANT_ITEM:
                 case SPELL_EFFECT_ENCHANT_ITEM_TEMPORARY:
+                case SPELL_EFFECT_ENCHANT_ITEM_PRISMATIC:
                 case SPELL_EFFECT_DISENCHANT:
                 case SPELL_EFFECT_PROSPECTING:
                 case SPELL_EFFECT_MILLING:
@@ -5008,6 +5009,7 @@ uint8 Spell::CheckItems()
                 break;
             }
             case SPELL_EFFECT_ENCHANT_ITEM:
+            case SPELL_EFFECT_ENCHANT_ITEM_PRISMATIC:
             {
                 Item* targetItem = m_targets.getItemTarget();
                 if(!targetItem)