Revert "loplugin:unreffun"

This reverts commit 7686f93f.

chart2/source/view/charttypes/GL3DBarChart.cxx

@@ -294,6 +294,28 @@ void GL3DBarChart::update()
     render();
 }
 
+namespace {
+
+class PickingModeSetter
+{
+private:
+    opengl3D::OpenGL3DRenderer* mpRenderer;
+
+public:
+    PickingModeSetter(opengl3D::OpenGL3DRenderer* pRenderer):
+        mpRenderer(pRenderer)
+    {
+        mpRenderer->SetPickingMode(true);
+    }
+
+    ~PickingModeSetter()
+    {
+        mpRenderer->SetPickingMode(false);
+    }
+};
+
+}
+
 void GL3DBarChart::clickedAt(const Point& /*rPos*/, sal_uInt16 nButtons)
 {
     if(mbBlockUserInput)