[PMC] Free the parent class's memory when destroying a NameSpace PMC. Also use the nice typed memory allocator.
[PMC] Free the parent class's memory when destroying a NameSpace PMC.
Also use the nice typed memory allocator.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@18133 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot