Just fixing an indent.

jme3-core/src/main/java/com/jme3/scene/Node.java

@@ -195,7 +195,7 @@ public class Node extends Spatial {
     void invalidateUpdateList() {
         updateListValid = false;
         if ( parent != null ) {
-          parent.invalidateUpdateList();
+            parent.invalidateUpdateList();
         }
     }