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.h
+++ b/src/ov-class.h
@@ -146,6 +146,8 @@
 
   bool reconstruct_exemplar (void);
 
+  static void clear_exemplar_map (void);
+
   bool reconstruct_parents (void);
 
   bool save_ascii (std::ostream& os);