[PMC] Plugged a memory leak in Context's destroy(), where NULLing the Context's attributes prevented Parrot_pmc_destroy() from being able to recycle auto-allocated attributes.  This fixes at least part of the leak reported by Lewis Wall in TT #1264.
[PMC] Plugged a memory leak in Context's destroy(), where NULLing the Context's
attributes prevented Parrot_pmc_destroy() from being able to recycle
auto-allocated attributes.  This fixes at least part of the leak reported by
Lewis Wall in TT #1264.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@42428 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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