classes.struct: Fix prettyprint for PACKED-STRUCT. Fixes #162.
classes.struct: Fix prettyprint for PACKED-STRUCT. Fixes #162.

mcandre/factor,erg/factor,mcandre/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,erg/factor,erg/factor,mcandre/factor,erg/factor,erg/factor