Fix gaussianedge GM

Change-Id: Ia4523ea13992b325cb59f42e4458a199c7a98c4b
Reviewed-on: https://skia-review.googlesource.com/10219
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
4 files changed