[sugar] Little patch for telepathy-stream-engine to ensure xv is used for the video output

[Sjoerd Simons]

Hi,

  As discussed on irc. Attached is a small patch that ensures the Call activity
  uses an xvimagesink for the main video output and an ximagesink for the
  video preview. Apart from using less cpu when scaling (Although i don't know
  if Call does that) on B1 and B2 machine it also has the added benifit of
  making the colors of the video output look ugly due to the xv issue.

  Sjoerd
-- 
All men know the utility of useful things;
but they do not know the utility of futility.
		-- Chuang-tzu
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