minor code cleanup

app/render/renderer.h

@@ -76,6 +76,8 @@ public:
 
   TexturePtr InterlaceTexture(TexturePtr top, TexturePtr bottom, const VideoParams &params);
 
+  QVariant GetDefaultShader();
+
   void Destroy();
 
   virtual void PostDestroy() = 0;
@@ -134,6 +136,8 @@ private:
 
   QMutex color_cache_mutex_;
 
+  QVariant default_shader_;
+
   QVariant interlace_texture_;
 
 };