fix deadlock in LRU moves
fix deadlock in LRU moves

missed this before pushing to next :(

elfchief/memcached,gencer/memcached,elfchief/memcached,elfchief/memcached,memcached/memcached,dormando/memcached,guikcd/memcached,dormando/memcached,dormando/memcached,memcached/memcached,bpzhang/memcached,dormando/memcached,bpzhang/memcached,dormando/memcached,gencer/memcached,gencer/memcached,memcached/memcached,memcached/memcached,gencer/memcached,guikcd/memcached,elfchief/memcached,bpzhang/memcached,bpzhang/memcached,elfchief/memcached,memcached/memcached,gencer/memcached,guikcd/memcached,guikcd/memcached,guikcd/memcached