[mythtv] MacOS X MMX yuv420_2vuy Patch

[Nigel Pearson]

> At other times, it would crash as soon as I started Live TV.

	I got this a few times. A crashlog narrowed it down,
and Daniel has helped me patch it. Try SVN @10996

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Nigel Pearson, nigel at ind.tansu.com.au|"Look at this!
Telstra Net. Eng., Sydney, Australia | Do you think I put this in
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