algorithm in it.  The old algorithm appeared to look for the first
place to put a new data block, and thus a new freespace block (this is
where the 'foundindex' variable came from).  However, new space in a
directory is always added at the lowest file offset as determined by
the extent list.  So this stuff is never used.

I completely ripped out the reminants of the old algorithm, and
(again) moved the freespace block add code inside the conditional
where a data block is added.

SGI Modid: 2.5.x-xfs:slinx:159751a