fix legacy/SkRasterPipeline SkHighContrastFilter

Change-Id: I395be972abf571af79ccf6ed5917bf463fd2166d
Reviewed-on: https://skia-review.googlesource.com/16709
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
1 file changed