Hotfix GhostJumpAndRun

src/de/steamwar/lobby/jumpandrun/GhostJumpAndRun.java

@@ -127,7 +127,9 @@ public class GhostJumpAndRun implements Listener {
                 if (!iterator.hasNext() || entityPlayer == null) {
                     replayRunnable.cancel();
                     replayRunnable = null;
-                    entityServer.close();
+                    if (entityServer != null) {
+                        entityServer.close();
+                    }
                     entityServer = null;
                     entityPlayer = null;
                     return;