fixed JmeBatchRendererBackend that was not properly reseting the forcedRenderState of the renderer causing depth test and depth write to be disable once th first frame was rendered

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10630 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

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

@@ -452,6 +452,7 @@ public class JmeBatchRenderBackend implements BatchRenderBackend {
 
       material.setTexture("ColorMap", textureAtlas);
       material.render(meshGeometry, renderManager);
+      renderManager.setForcedRenderState(null);
     }
 
     private RenderState.BlendMode convertBlend(final BlendMode blendMode) {