Potentially-uninitialized Sk3LookAt result

Bug: oss-fuzz:20520
Change-Id: I383881571fa156c6faa5e798a1e126bb9e5e8dd0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/268621
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
4 files changed