Core/Units: updated crit healing bonus calculation with patch 4.2.0 change

src/server/game/Entities/Unit/Unit.cpp

@@ -7202,22 +7202,8 @@ float Unit::SpellCritChanceTaken(Unit const* caster, SpellInfo const* spellInfo,
 
 /*static*/ uint32 Unit::SpellCriticalHealingBonus(Unit const* caster, SpellInfo const* spellProto, uint32 damage)
 {
-    // Calculate critical bonus
-    int32 crit_bonus;
-    switch (spellProto->DmgClass)
-    {
-        case SPELL_DAMAGE_CLASS_MELEE:                      // for melee based spells is 100%
-        case SPELL_DAMAGE_CLASS_RANGED:
-            /// @todo write here full calculation for melee/ranged spells
-            crit_bonus = damage;
-            break;
-        default:
-            crit_bonus = damage / 2;                        // for spells is 50%
-            break;
-    }
-
-    if (crit_bonus > 0)
-        damage += crit_bonus;
+    // As of Patch 4.2.0 (2011-06-28): all healing spells now crit for 200% instead of 150%
+    damage *= 2;
 
     if (caster)
         damage = int32(float(damage) * caster->GetTotalAuraMultiplier(SPELL_AURA_MOD_CRITICAL_HEALING_AMOUNT));