xfstests, aio-dio-extend-stat.c: fix error reporting

[Rich Johnston]

Jeff thanks for submitting this patch.  Looks good.

Reviewed-by: Rich Johnston <rjohnston at sgi.com>


This has been committed.

--Rich


commit 06166c2dbaedce9db77b9c6325e21ddf760a7623
Author: Jeff Moyer <jmoyer at redhat.com>
Date:   Fri Jan 18 22:01:57 2013 +0000

     xfstests, aio-dio-extend-stat.c: fix error reporting

     If we receive an unexpected result from an async write, the error
     reporting does not tell the actual number of bytes written.  Fix that,
     and also a couple of typos in printf's.