Add GetScrollHelper() to wxWindow.

Let wxScrollHelper set the underlying field itself.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41205 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/scrlwing.cpp

@@ -311,6 +311,8 @@ wxScrollHelper::wxScrollHelper(wxWindow *win)
     m_handler = NULL;
 
     m_win = win;
+    
+    m_win->SetScrollHelper( this );
 
     // by default, the associated window is also the target window
     DoSetTargetWindow(win);