Protect against div-by-zero in GrSmallPathRenderer::onCanDrawPath

Bug: oss-fuzz:33865
Change-Id: I769e28ace7a61a5a1053777ce8270365975620c5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/433136
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
1 file changed