add docstring for previous commit

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@15665 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: alexbruy

src/gui/qgisinterface.h

@@ -238,6 +238,8 @@ class GUI_EXPORT QgisInterface : public QObject
     virtual QToolBar *attributesToolBar() = 0;
     virtual QToolBar *pluginToolBar() = 0;
     virtual QToolBar *helpToolBar() = 0;
+    /** \note added in 1.7
+    */
     virtual QToolBar *rasterToolBar() = 0;
 
     //! File menu actions