TAKE - make xfs and spinlock debugging coexist

[Steve Lord <lord@sgi.com>]

Take the mountain to mohammed approach, make the spinlock
check which broke with xfs explicitly use a signed char.
Finally listened to Andrew Morton.

Date:  Thu May 30 02:32:18 PDT 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-newlog

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:120437a
linux/include/asm-i386/spinlock.h - 1.24
linux/fs/xfs/linux/xfs_super.h - 1.18