patch applied (ghc-6.8/ghc): Small improvement to GraphColor.selectColor

[Ben Lippmeier]

Thu Sep  6 03:33:47 PDT 2007  Ben.Lippmeier at anu.edu.au
  * Small improvement to GraphColor.selectColor
  
  When selecting a color for a node, try and avoid using colors that
  conflicting nodes prefer. Not sure if this'll make much difference,
  but it was easy enough to add..
  

    M ./compiler/nativeGen/GraphColor.hs -7 +27