Different approach to backwards compatibility. Fixes #1220 again

git-svn-id: http://svn.osgeo.org/qgis/trunk@11276 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: homann

src/core/renderer/qgsrenderer.h

@@ -72,11 +72,12 @@ class CORE_EXPORT QgsRenderer
 
     /**A vector layer passes features to a renderer object to change the brush and pen of the qpainter
       @note added in 1.2 */
-    //void renderFeature( QgsRenderContext &renderContext, QgsFeature& f, QImage* pic, bool selected )
-    //{
-    //  void renderFeature( renderContext, f, pic, selected, 255); 
-    //}
-    virtual void renderFeature( QgsRenderContext &renderContext, QgsFeature& f, QImage* pic, bool selected, double opacity = 1.0 ) = 0;
+    void renderFeature( QgsRenderContext &renderContext, QgsFeature& f, QImage* pic, bool selected )
+    {
+      renderFeature( renderContext, f, pic, selected, 1.0); 
+    }
+
+    virtual void renderFeature( QgsRenderContext &renderContext, QgsFeature& f, QImage* pic, bool selected, double opacity ) = 0;
 
     /**Reads the renderer configuration from an XML file
      @param rnode the Dom node to read