rem: ent = XMALLOC (struct dev_ino, 1);
add: ent = xmalloc (sizeof *ent);
context: visit_dir (dev_t dev, ino_t ino){  struct dev_ino *ent;  struct dev_ino *ent_from_table;  int found_match;  ent = XMALLOC (struct dev_ino, 1);  ent->st_ino = ino;  ent->st_dev = dev;  /* Attempt to insert this entry into the table.  */  ent_from_table = hash_insert (active_dir_set, ent);  if (ent_from_table == NULL)    {      /* Insertion failed due to lack of memory.  */      xalloc_die ();    }  found_match = (ent_from_table != ent);  if (found_match)    {      /* ent was not inserted, so free it.  */      free (ent);    }  return found_match;}