[mythtv] issue with display whilst using xinerama

[Steven]

> 
> Ahh.  Thanks for pointing me in the right direction.  Yes, that will do 
> it -- though m_scan is a pretty complex state machine and I hesitate to 
> make a hasty change there.  The attached patch will also fix it.
> 
> Now can I go on vacation? :-)
> 

The patch fixes things for me. I'm happy using kernel-deint again.

BTW, bob seems to have the fields reversed on my system (I think). I see
shaking (up and down) lines, especialy at the top and bottom of the
image.