skal 63f9aba4b3 special-case WHT transform when there's only DC
happens surprisingly often at low quality, so we might
as well hard-code a simplified TransformWHT() directly.

Change-Id: Ib7a858ef74e8f334bd59d6512bf5bd3e455c5459
2013-10-02 14:27:36 +02:00
..
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