fixed bitmap constructor for monochrome bitmaps

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2256 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/image/image.cpp

@@ -143,6 +143,9 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 
   dc.DrawText( "Loaded image", 30, 10 );
   if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
+  
+  wxBitmap bm( 1200, 1, 1 );
+  dc.DrawBitmap( bm, 10, 10 );
 
   dc.DrawText( "Drawn directly", 150, 10 );
   dc.SetBrush( wxBrush( "orange", wxSOLID ) );