[docs] Typo error 21.10.ossaudiodev Python 2.7 documentation

[Ken Housley]

In 21.10.1 Audio Device Objects near the end of the section there is
an example of how to use the setparameters() method.
The example is said to be equivalent to three separate statements.
The last of the three statements is:

rate = dsp.rate(channels)

I think the statement should be

rate = dsp.rate(rate)

It is a minor correction, but we would want to fix the small errors as
well as the big ones, right?  The error appears on the web at

http://docs.python.org/2/library/ossaudiodev.html

and in the pdf file library.pdf in the python 2.7 documentation.


Thanks,

Ken Housley