TAKE - remove debug() from xfs_error.c (so xfs.o can load as module again)

[Jim Mostek <mostek@xxxxxxx>]

Modid:  2.3.99pre2-xfs:slinx:57492a
Date:  Tue Apr 11 11:31:05 PDT 2000
Workarea:  clink.americas.sgi.com:/data/clink/io/mostek/slinx-xfs

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.3.99pre2-xfs

linux/fs/xfs/xfs_error.c - 1.26
http://oss.sgi.com/cgi-bin/cvsweb.cgi/linux-2.4-xfs/linux/fs/xfs/xfs_error.c.diff?r1=text&tr1=1.26&r2=text&tr2=1.25&f=h
        - Change debug() to BUG() for Linux since debug() was recently removed.
          This now allows xfs.o to load as a module.