clear -classes and support. * ov-class.h (octave_class::clear_exemplar_map): New function. * ov-class.cc (octave_class::clear_exemplar_map): New function. * symtab.h (symbol_record::clear_objects): New function * symtab.h (symbol_record::do_clear_objects): New function * variables.cc (do_matlab_compatible_clear, clear): Added classes option

--- a/src/ov-class.cc
+++ b/src/ov-class.cc
@@ -846,6 +846,12 @@
   return retval;
 }
 
+void
+octave_class::clear_exemplar_map (void)
+{
+  exemplar_map.clear ();
+}
+
 //  Load/save does not provide enough information to reconstruct the
 //  class inheritance structure.  reconstruct_parents () attempts to
 //  do so.  If successful, a "true" value is returned.