Adjustments to spell facing - Adjusted HaveAtClient to accept Object* (still accepts all subordinates) - Use grid searcher to find players in visibility range for unit - Use client cache instead of "See or Detect" to decide who to send updates to - Adjusted SendUpdateToPlayer to send createobject packet only if not known to client

(cherry picked from commit c0693a6ee52d31840ab2ee878c4881884b857638)

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

@@ -239,7 +239,10 @@ void Object::SendUpdateToPlayer(Player* player)
     UpdateData upd(player->GetMapId());
     WorldPacket packet;
 
-    BuildCreateUpdateBlockForPlayer(&upd, player);
+    if (player->HaveAtClient(this))
+        BuildValuesUpdateBlockForPlayer(&upd, player);
+    else
+        BuildCreateUpdateBlockForPlayer(&upd, player);
     upd.BuildPacket(&packet);
     player->GetSession()->SendPacket(&packet);
 }