Remove commented (incorrect) bytesPerRow.  Use samplesPerPixel.  Add to comment on pixel order.
Remove commented (incorrect) bytesPerRow.  Use samplesPerPixel.  Add to comment on pixel order.

git-svn-id: cb3fc60f0f557b927b8032d8a94e869b6f9f230b@2124 0fceea05-a30d-0410-8a8b-80ef821fb0a1

camillobruni/skim,camillobruni/skim,jasongrout/skim,jasongrout/skim,camillobruni/skim,camillobruni/skim