[GC] Removed an unnecessary memset() from get_free_buffer(), as the underlying allocator has already cleared the memory.
[GC] Removed an unnecessary memset() from get_free_buffer(), as the underlying
allocator has already cleared the memory.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@42599 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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