resolved some bugs in slab allocator
resolved some bugs in slab allocator

git-svn-id: e73c8432560a29173e2a5a19c6413d8f5aa32dee@189 78f6c469-4e3a-0410-bca2-dfd793a85426

samueldotj/AceOS,samueldotj/AceOS,samueldotj/AceOS,samueldotj/AceOS