Applying patch for bug 22383

[Mike.lifeguard]

For bug 22383 (X server stuck in infinite loop on laptop lid close),
Jesse Barnes has asked to try applying a very simple patch. However, I
don't know how to do that - I've only used packaged code from Ubuntu
and/or from various PPAs. Is there a how-to on x.org somewhere I haven't
found, or would someone be able to give me some pointers?

Thanks,
-Mike
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