Use unsigned int to track POD skip

Bug: chromium:1274323
Change-Id: I5d2a25c381ddfa21e56b630139fa61a0bdd8d4e0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/488527
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
1 file changed