1. undid wxGTK timer hack, corrected bug in my code

2. clip wxPaintDC to the client area


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxUNIVERSAL@8343 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/univ/scrolbar.cpp

@@ -451,6 +451,7 @@ void wxScrollBarTimer::Notify()
     if ( m_skipNext )
     {
         // scroll normally now - reduce the delay
+        Stop();
         Start(50); // FIXME: hardcoded delay
 
         m_skipNext = FALSE;