Small fix:
ignore empty unresolved blocks to avoid (unnecessary) ASSERT later

Change-Id: I5abdc7f36d5f9a9be1c52aea2df29f565f606996
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/267922
Commit-Queue: Julia Lavrova <jlavrova@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed