[autoroll] Fix out-of-bounds error
[autoroll] Fix out-of-bounds error

Bug: skia:
Change-Id: I476587cf9b02e42c3ef1fbed7fff467648784790
Reviewed-on: https://skia-review.googlesource.com/93601
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot