bracket SkPath pathRefIsValid with define

Add defines around the places calls
SkPath::pathRefIsValid()

R=fmalita@chromium.org

Bug:913930
Change-Id: Iffaa85cecf127cf8cb405dffe76666f9184de76e
Reviewed-on: https://skia-review.googlesource.com/c/176583
Commit-Queue: Cary Clark <caryclark@skia.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2 files changed