Fix redo too

BauSystem_Main/src/de/steamwar/bausystem/region/Region.java

@@ -517,20 +517,15 @@ public class Region {
 
     public boolean redo() {
         initSessions();
-        EditSession session = null;
-        try {
-            session = redoSessions.pop();
-            if (session == null) {
+        EditSession session = redoSessions.pop();
+        if (session == null)
             return false;
+
+        try (EditSession e = WorldEdit.getInstance().getEditSessionFactory().getEditSession(new BukkitWorld(Bukkit.getWorlds().get(0)), -1)) {
+            session.redo(e);
+            undoSessions.push(e);
         }
-            session.redo(session);
-            undoSessions.push(session);
         return true;
-        } finally {
-            if (session != null) {
-                session.flushSession();
-            }
-        }
     }
 
     public boolean backup() {