TAKE - fix an xfs recovery bug

[Steve Lord <lord@sgi.com>]

There was a mistake in some of the linux specific code in here,
not sure what the end effect of this actually was since recovery
is pretty reliable.

Date:  Fri May 31 11:05:18 PDT 2002
Workarea:  jen.americas.sgi.com:/src/lord/xfs-baseline

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


Modid:  2.4.x-xfs:slinx:120573a
linux/fs/xfs/xfs_log_recover.c - 1.231
	- Fix a recovery bug - miscalculation of which block is the end of the log