clarify hashsize typepdef in assoc.c to be 32-bit
clarify hashsize typepdef in assoc.c to be 32-bit

no bug, but confusing code.

memcached/memcached,dormando/memcached,memcached/memcached,dormando/memcached,dormando/memcached,memcached/memcached,memcached/memcached,dormando/memcached,memcached/memcached,dormando/memcached