Simplify testcase. Print ret, not errno.

1. The testcase only needs to test whether or not a valid aio_* operation
had been started, so aio_write can be removed.
2. The previous code was printing out the global errno value, not the
returned value from aio_error, and the manpage states that that should
be done.

Signed-off-by: Garrett Cooper <yanegomi@gmail.com>
1 file changed