Forced depth range to 0,0 in NiftyJmeDisplay processor before rendering nifty to avoid depth check issues between the 3D scene and the text elements of the nifty gui.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9941 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/niftygui/com/jme3/niftygui/NiftyJmeDisplay.java

@@ -171,8 +171,10 @@ public class NiftyJmeDisplay implements SceneProcessor {
     public void postQueue(RenderQueue rq) {
         // render nifty before anything else
         renderManager.setCamera(vp.getCamera(), true);
+        renderer.setDepthRange(0, 0);
         //nifty.update();
         nifty.render(false);
+        renderer.setDepthRange(0, 1);
         renderManager.setCamera(vp.getCamera(), false);
     }