Load temporary map animations from S4 files

src/openrct2/network/NetworkBase.cpp

@@ -2848,6 +2848,7 @@ bool NetworkBase::LoadMap(IStream* stream)
         auto loadResult = importer->LoadFromStream(stream, false);
         objManager.LoadObjects(loadResult.RequiredObjects);
 
+        MapAnimation::ClearAll();
         // TODO: Have a separate GameState and exchange once loaded.
         auto& gameState = getGameState();
         importer->Import(gameState);