avoid crash on exceptions thrown in handle class delete method * ov-classdef (handle_cdef_object::~handle_cdef_object): Use same technique as in octave_oncleanup::~octave_oncleanup to avoid crashes if exceptions are thrown while executing handle class delete method while inside C++ class destructor.

791f51373ba1b80c8ae3b7a9d2509d8a827a3e25 gnulib