fixed an issue where calling setCursorVisible on the ChaseCameraAppstate before it's initialized was causing an NPE.

jme3-core/src/main/java/com/jme3/app/ChaseCameraAppState.java

@@ -127,6 +127,7 @@ public class ChaseCameraAppState extends AbstractAppState implements ActionListe
         initTogleRotateInput();
 
         inputManager.addListener(this, inputs);
+        inputManager.setCursorVisible(dragToRotate);
     }
 
     public void onAction(String name, boolean keyPressed, float tpf) {
@@ -429,8 +430,10 @@ public class ChaseCameraAppState extends AbstractAppState implements ActionListe
     public void setDragToRotate(boolean dragToRotate) {
         this.dragToRotate = dragToRotate;
         this.canRotate = !dragToRotate;
+        if(inputManager != null){
             inputManager.setCursorVisible(dragToRotate);
         }
+    }
 
     /**
      * invert the vertical axis movement of the mouse