Apply the depth texture correctly as the DepthStencil surface in applyRenderTarget

Trac #20875
Signed-off-by: Nicolas Capens

git-svn-id: https://angleproject.googlecode.com/svn/trunk@1115 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/Framebuffer.h b/src/libGLESv2/Framebuffer.h
index b73f9a0..14d9c2a 100644
--- a/src/libGLESv2/Framebuffer.h
+++ b/src/libGLESv2/Framebuffer.h
@@ -49,6 +49,7 @@
     Renderbuffer *getColorbuffer();
     Renderbuffer *getDepthbuffer();
     Renderbuffer *getStencilbuffer();
+    Renderbuffer *getNullColorbuffer();
 
     GLenum getColorbufferType();
     GLenum getDepthbufferType();
@@ -73,6 +74,8 @@
     GLenum mStencilbufferType;
     BindingPointer<Renderbuffer> mStencilbufferPointer;
 
+    BindingPointer<Renderbuffer> mNullColorbufferPointer;
+
   private:
     DISALLOW_COPY_AND_ASSIGN(Framebuffer);