TAKE - fix two warnings, XFS qa 019

[dxm@xxxxxxxxxxxxxxxxxxxxxxx (Daniel Moore)]

    - fix type warning in xfs_vfsops
    - fix cast warning in xfs_extfree_item.c
    - move def of __psint_t into kernel
    - add test 019 a mkfs protofile test

Modid:  2.4.0-test1-xfs:slinx:67839a
Date:  Wed Jul 26 00:00:20 PDT 2000
Workarea:  snort:/build1/people/dxm/isms/slinx-xfs
Author:  dxm

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.0-test1-xfs

cmd/xfs/stress/group - 1.17
        - add 019

linux/fs/xfs/pseudo-inc/sys/types.h - 1.17
        - only define psint for SIM

linux/fs/xfs/xfs_extfree_item.c - 1.43
        - fix cast from pointer to 64 bit

linux/fs/xfs/xfs_types.h - 1.45
        - define __psint_t - an integer big enough to hold a pointer

linux/fs/xfs/xfs_vfsops.c - 1.282
        - fix warning

cmd/xfs/stress/019 - 1.1
        - simple mkfs test

cmd/xfs/stress/019.out - 1.1
        - output for 019