check that rect is finite before jamming our bounds

Bug: skia:7507
Change-Id: I45ff36f96951f63795fdc09fdd8e3083865f6eda
Reviewed-on: https://skia-review.googlesource.com/101461
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
2 files changed