[mythtv] LIRC inputs makes the screen blink

[Jesper Toft]

Hi,

When i press a LIRC button, the screen blinks (It turns black for about .1 
- .5 second). It turns out that resetting the X screensaver, makes the screen 
blink ( at least on my setup ). The following patch solves the problem for 
me.

/Jesper
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