- re-add some depth func stuff from ios renderer (only stable branch)

git-svn-id: https://jmonkeyengine.googlecode.com/svn/branches/3.0final@11049 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/ios/com/jme3/renderer/ios/IGLESShaderRenderer.java

@@ -163,7 +163,7 @@ public class IGLESShaderRenderer implements Renderer {
         
         if (state.isDepthTest() && !context.depthTestEnabled) {
             JmeIosGLES.glEnable(JmeIosGLES.GL_DEPTH_TEST);
-            JmeIosGLES.glDepthFunc(convertTestFunction(context.depthFunc));
+            JmeIosGLES.glDepthFunc(convertTestFunction(JmeIosGLES.GL_LEQUAL));
             JmeIosGLES.checkGLError();
             context.depthTestEnabled = true;
         } else if (!state.isDepthTest() && context.depthTestEnabled) {