Workaround win2019 bad bit field code gen

Change-Id: I51130e4a0f62eb9e803710c23a7c5efda6b48012
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529607
Reviewed-by: Arman Uguray <armansito@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed