Ignore the unknown types of the script result, in particular don't crash trying to dereference an uninitialized pointer if the script didn't return anything. Closes #12361. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65673 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775