565 color xforms: make sure we clamp if necessary

Bug: skia:
Change-Id: I48528a0ff8dd199e0cd1649f973b5722384eacf3
Reviewed-on: https://skia-review.googlesource.com/10581
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
1 file changed