[gc_api] change sized pools so they can allocate objects of size sizeof(void*) and up, where they previously couldn't allocate objects smaller then sizeof(Buffer)
[gc_api] change sized pools so they can allocate objects of size sizeof(void*) and up, where they previously couldn't allocate objects smaller then sizeof(Buffer)

git-svn-id: 1eb33f31d1a165515dfa52993683d2778fcf3173@38546 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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