[mythtv] [PATCH] denoise3d MMX fix

[Andrew Mahone]

This one-character change will fix a problem in denoise3d's MMX codepath.  The 
faulty code was adding filter values to pixel values as sets of 2 packed 
double words instead of sets of 8 packed bytes, causing vertical bands in the 
filtered image which are more prominent as spatial filter strength increases.  

Thanks to Debabrata Banerjee for the detailed bug report that helped me find 
it.
-- 
  Andrew Mahone
  andrewmahone AT eml DOT cc