if (hash->arena) {
if (hash->i_alloced_arena) {
nssHash_Destroy(  nssHash *hash){  (void)PZ_DestroyLock(hash->mutex);  PL_HashTableDestroy(hash->plHashTable);  if (hash->arena) {    nssArena_Destroy(hash->arena);  } else {    nss_ZFreeIf(hash);  }}