Do not display hit fader if the player wasn't damaged

apps/openmw/mwclass/npc.cpp

@@ -775,13 +775,14 @@ namespace MWClass
                 damage = scaleDamage(damage, attacker, ptr);
 
             if(damage > 0.0f)
+            {
                 sndMgr->playSound3D(ptr, "Health Damage", 1.0f, 1.0f);
-            float health = getCreatureStats(ptr).getHealth().getCurrent() - damage;
-            setActorHealth(ptr, health, attacker);
-
                 if (ptr.getRefData().getHandle() == "player")
                     MWBase::Environment::get().getWindowManager()->activateHitOverlay();
             }
+            float health = getCreatureStats(ptr).getHealth().getCurrent() - damage;
+            setActorHealth(ptr, health, attacker);
+        }
         else
         {
             MWMechanics::DynamicStat<float> fatigue(getCreatureStats(ptr).getFatigue());