[Client] Ignore invalid object refIds from ObjectPlace packets

apps/openmw/mwmp/WorldEvent.cpp

@@ -173,8 +173,11 @@ void WorldEvent::placeObjects(MWWorld::CellStore* cellStore)
 
         // Only create this object if it doesn't already exist
         if (!ptrFound)
+        {
+            try
             {
                 MWWorld::ManualRef ref(world->getStore(), worldObject.refId, 1);
+
                 MWWorld::Ptr newPtr = ref.getPtr();
 
                 if (worldObject.count > 1)
@@ -194,6 +197,12 @@ void WorldEvent::placeObjects(MWWorld::CellStore* cellStore)
 
                 if (guid == Main::get().getLocalPlayer()->guid && worldObject.droppedByPlayer)
                     world->PCDropped(newPtr);
+
+            }
+            catch (std::exception&)
+            {
+                LOG_APPEND(Log::LOG_INFO, "-- Ignored placement of invalid object");
+            }
         }
         else
             LOG_APPEND(Log::LOG_VERBOSE, "-- Object already existed!");