Core/Spells: Some corrections after 65aca2b806, this should fix the console spam

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

@@ -1672,6 +1672,9 @@ bool WorldObject::canSeeOrDetect(WorldObject const* obj, bool ignoreStealth, boo
         if (Player const* player = this->ToPlayer())
             viewpoint = player->GetViewpoint();
 
+        if (!viewpoint)
+            viewpoint = this;
+
         if (!corpseCheck && !viewpoint->IsWithinDist(obj, GetSightRange(obj), false))
             return false;
     }