don't repaint window if hidden: reduces flickering of hidden windows which change position (resulting in a repaint) due to for example sizer code

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27156 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -1501,7 +1501,7 @@ void wxWindowMSW::DoMoveWindow(int x, int y, int width, int height)
         width = 0;
     if (height < 0)
         height = 0;
-    if ( !::MoveWindow(GetHwnd(), x, y, width, height, TRUE) )
+    if ( !::MoveWindow(GetHwnd(), x, y, width, height, IsShown() /*Repaint?*/) )
     {
         wxLogLastError(wxT("MoveWindow"));
     }