Merge pull request #4726 from ille/baa2252bd31718e93ccc3e97aa81afeecb5ec9c3

Core/GameObject: implement stealth/invisibility for traps

src/server/game/Entities/Object/Object.cpp

@@ -1807,11 +1807,15 @@ bool WorldObject::CanDetectStealthOf(WorldObject const* obj) const
 
         // Level difference: 5 point / level, starting from level 1.
         // There may be spells for this and the starting points too, but
-        //   not in the DBCs of the client.
+        // not in the DBCs of the client.
         detectionValue += int32(getLevelForTarget(obj) - 1) * 5;
 
         // Apply modifiers
         detectionValue += m_stealthDetect.GetValue(StealthType(i));
+        if (obj->isType(TYPEMASK_GAMEOBJECT))
+            if (Unit* owner = ((GameObject*)obj)->GetOwner())
+                detectionValue -= int32(owner->getLevelForTarget(this) - 1) * 5;
+
         detectionValue -= obj->m_stealth.GetValue(StealthType(i));
 
         // Calculate max distance