allow objects to load if constructor fails but loadobj method succeeds * ov-class.cc (octave_class::reconstruct_exemplar): Don't throw error if constructor execution fails. (octave_class::load_ascii, octave_class::load_binary, octave_class::load_hdf5): Attempt to handle exemplar and loadobj method consistently.

#include <octave/oct.h>

DEFUN_DLD (helloworld, args, nargout,
  "Hello World Help String")
{
  int nargin = args.length ();

  octave_stdout << "Hello World has "
                << nargin << " input arguments and "
                << nargout << " output arguments.\n";

  return octave_value_list ();
}