applying patch, closes #11309

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63177 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/listctrl.cpp

@@ -4310,6 +4310,11 @@ void wxGenericListCtrl::CreateOrDestroyHeaderWindowAsNeeded()
 #endif
 
         GetSizer()->Prepend( m_headerWin, 0, wxGROW );
+#ifdef __WXOSX__
+        // TODO not tested under other platforms, remove the platform condition if
+        // it works on those as well
+        GetSizer()->SetItemMinSize( m_headerWin, wxSize(-1,m_headerHeight) ); 
+#endif
     }
     else
     {