Address fuzzer issue

TBR=egdaniel@google.com
Bug: 866775
Change-Id: I6d1fa18c4abfad26bf137e491ca2f3ac6b3d7b03
Reviewed-on: https://skia-review.googlesource.com/143101
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed