Calculate armor reduction only for attacks with SPELL_SCHOOL_MASK_NORMAL

--HG--
branch : trunk

src/game/Unit.cpp

@@ -1367,7 +1367,7 @@ void Unit::CalculateMeleeDamage(Unit *pVictim, uint32 damage, CalcDamageInfo *da
     // Add melee damage bonus
     MeleeDamageBonus(damageInfo->target, &damage, damageInfo->attackType);
     // Calculate armor reduction
-    damageInfo->damage = CalcArmorReducedDamage(damageInfo->target, damage);
+    damageInfo->damage = (damageInfo->damageSchoolMask & SPELL_SCHOOL_MASK_NORMAL) ? CalcArmorReducedDamage(damageInfo->target, damage) : damage;
     damageInfo->cleanDamage += damage - damageInfo->damage;
 
     damageInfo->hitOutCome = RollMeleeOutcomeAgainst(damageInfo->target, damageInfo->attackType);