Use wxNO_FULL_REPAINT_ON_RESIZE in drawing sample.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@8465 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/drawing/drawing.cpp

@@ -346,7 +346,8 @@ END_EVENT_TABLE()
 
 #include "../image/smile.xpm"
 
-MyCanvas::MyCanvas( MyFrame *parent ) : wxScrolledWindow( parent )
+MyCanvas::MyCanvas( MyFrame *parent ) : 
+   wxScrolledWindow( parent, -1, wxDefaultPosition, wxDefaultSize, wxNO_FULL_REPAINT_ON_RESIZE )
 {
     m_owner = parent;
     m_show = Show_Default;