Unmount a NPC at dying

[Anti]

I have tried to unmount npc at setDeathState here

@@ -1225,10 +1225,13 @@ void Creature::setDeathState(DeathState s)
        if (canFly() && FallGround())
            return;

        if (!IsStopped())
            StopMoving();
+
+        if (IsMounted())
+            Unmount();
    }
    Unit::setDeathState(s);

    if (s == JUST_DIED)
    {

but after NPC respawning it doesn't visible. Only mount visible.

http://filebeam.com/fade6f01a12057b8d100e7dd75dcc8f3.jpg

There are some kind of visual bug but i haven't any ideas.

PS After grid reload a NPC became visible.

added the bug is actualy only for force respawning.