Applied patch [ 803473 ] wxListCtrl header height bugfix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23514 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/listctrl.h

@@ -201,6 +201,7 @@ public:
                          m_ownsImageListState;
     wxListHeaderWindow  *m_headerWin;
     wxListMainWindow    *m_mainWin;
+    wxCoord              m_headerHeight;
 
 protected:
     // return the text for the given column of the given item
@@ -222,6 +223,9 @@ private:
     // create the header window
     void CreateHeaderWindow();
 
+    // calculate and set height of the header
+    void CalculateAndSetHeaderHeight();
+
     // reposition the header and the main window in the report view depending
     // on whether it should be shown or not
     void ResizeReportView(bool showHeader);