Fix valgrind crash in TransferFrom test.

Change-Id: Iac78e5a832d209227cca58dd9f359e3d4dbd7da6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/230396
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
1 file changed