fix for bug #1686328

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@47116 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/aui/framemanager.cpp

@@ -3231,6 +3231,7 @@ wxRect wxAuiManager::CalculateHintRect(wxWindow* pane_window,
     wxAuiDockUIPartArray uiparts;
     wxAuiPaneInfo hint = GetPane(pane_window);
     hint.name = wxT("__HINT__");
+    hint.PaneBorder(true);
     hint.Show();
 
     if (!hint.IsOk())