* winsup.h (access_worker): Declare with added fhandler_base parameter.

* winsup.h (access_worker): Declare with added fhandler_base parameter.
* syscalls.cc (access_worker): Accommodate extra fhandler_base argument.  Use
it instead of stat_worker to determine stat information, when appropriate.
* fhandler.cc (fhandler_base::device_access_denied): Pass fhandler pointer to
access_worker so that it can use the proper method for determining stat
information.
* fhandler_disk_file.cc (fhandler_disk_file::opendir): Ditto.