Fixed Via API usage

Author: FlorianMichael

common/src/main/java/com/viaversion/viarewind/protocol/protocol1_8to1_9/Protocol1_8To1_9.java

@@ -97,7 +97,9 @@ public void init(UserConnection userConnection) {
 		userConnection.put(new Cooldown(userConnection));
 		userConnection.put(new BlockPlaceDestroyTracker(userConnection));
 		userConnection.put(new BossBarStorage(userConnection));
-		userConnection.put(new ClientWorld(userConnection));
+		if (!userConnection.has(ClientWorld.class)) {
+			userConnection.put(new ClientWorld());
+		}
 	}
 
 	@Override