Fix wxListCtrl background colour bug Part I

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15133 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/window.h

@@ -112,6 +112,10 @@ public:
     // OnInternalIdle
     virtual void OnInternalIdle();
 
+    // For delayed background 
+    void GtkSetBackgroundColour( const wxColour &colour );
+    void GtkSetForegroundColour( const wxColour &colour );
+    
     // For compatibility across platforms (not in event table)
     void OnIdle(wxIdleEvent& WXUNUSED(event)) {}