Fix possible nullptr deref

Check that the fPathData object exists before
derefing to get the path.

BUG=chromium:873020

Change-Id: Ie381178f49905a0dc3f5c3a3477453d4785507f4
Reviewed-on: https://skia-review.googlesource.com/148385
Auto-Submit: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
1 file changed