Description:
------------
If some cache are stored after calling sleep(), its creation_time is time, when php script was executed without adding slept time.

Reproduce code:
---------------
<?php

  print time() . "\n";
  apc_clear_cache('user');

  apc_store('CompanyName_31', 'Google Inc.', 86400);

  sleep(5);

  apc_store('Location_27', '1600 Amphitheatre Parkway', 84600);

  print time() . "\n";
  
  var_dump(apc_cache_info('user'));

Expected result:
----------------
// imagine, time() returns value: 1281216994


1281216994

// var_dump shows, that "CompanyName_31" creation_time is: 1281216994
// var_dump shows, that "Location_27" creation_time is: 1281216999

1281216999

Actual result:
--------------
// imagine, time() returns value: 1281216994


1281216994
// var_dump shows, that "CompanyName_31" creation_time is: 1281216994
// var_dump shows, that "Location_27" creation_time is: 1281216994

1281216999