GiNaC/ginac structure.h

[Christian Bauer]

Update of /home/cvs/GiNaC/ginac

Modified Files:
      Tag: ginac_1-2
	structure.h 
Log Message:
- specializing structure<T>::get_class_name() allows proper archiving of
  structures
- added structure<T>::get_struct() to allow read and write access to the
  embedded struct T