[GC] Fixed a transient GC segfault introduced by r27074 and worked around the type punning error another way.
[GC] Fixed a transient GC segfault introduced by r27074 and worked around the
type punning error another way.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@27078 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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