make quickReject treat empty rects and paths the same

Change-Id: Ie334a2f0aa354ea3b52f6143e2659fd74fdd6185
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/334100
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2 files changed